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Logical error that can often be found in programming
An off-by-one error or off-by-one bug (known by acronyms OBOE, OBOB, OBO, and OB1) is a logic error that involves a number that differs from its intended
Off-by-one_error
Incorrect or inaccurate action
value. An error could result in failure or in a deviation from the intended performance or behavior. One reference differentiates between "error" and "mistake"
Error
Concepts from statistical hypothesis testing
only traded-off between the two types, by for example changing the significance threshold. Knowledge of type I errors and type II errors is applied widely
Type_I_and_type_II_errors
Bug in a program that causes incorrect operation, but not termination
float b) { return a + b / 2; // should be (a + b) / 2 } Syntax error Off-by-one error Breedlove, Todd W.; Albert, Randal L. (22 October 2010). C++: An
Logic_error
Computational error due to rounding numbers
In computing, a roundoff error, also called rounding error, is the difference between the result produced by a given algorithm using exact arithmetic
Round-off_error
Internet error message
indicates the error code. Since the condition is relatively commonly-encountered (i.e. due to broken or dead links), this code is one of the most recognizable
HTTP_404
Inherent flaw in computer instructions
a conditional such as using the wrong comparison operator, and the off-by-one error. Incorrect API usage. Incorrect protocol implementation. Incorrect
Software_bug
Coins with errors while minting
Mint error coins can be the result of deterioration of the minting equipment, accidents or malfunctions during the minting process, or interventions by mint
Mint-made_errors
Sigmoid shape special function
In mathematics, the error function (also called the Gauss error function), often denoted by e r f {\displaystyle \mathbf {erf} } , is the function erf
Error_function
Difference between a measured value of a quantity and its true value
marred by two distinct types of errors, systematic errors on the one hand, and random on the other hand. The effects of random errors can be mitigated by repeated
Observational_error
2019). "One-Hit Wonder Dust Off: "I Loved Her First" by Heartland". 106.5 WYRK. Retrieved July 9, 2024. Morris (2024), p. 142. sfnp error: no target:
List of one-hit wonders in the United States
List_of_one-hit_wonders_in_the_United_States
Measure of the error of an estimator
In statistics, the mean squared error (MSE) or mean squared deviation (MSD) of an estimator (of a procedure for estimating an unobserved quantity) measures
Mean_squared_error
Finding the number of elements of a finite set
still useful for some things. Refer also to the fencepost error, which is a type of off-by-one error. Inclusive counting is usually encountered when dealing
Counting
1992 aviation accident in Nepal
311 Garuda Indonesia Flight 152 List of airplane accidents in Nepal Off-by-one error "Airbus Industries A300, AP-BCP, accident near Kathmandu, Nepal, on
Pakistan International Airlines Flight 268
Pakistan_International_Airlines_Flight_268
Action with unintended consequences
Human error is an action that has been done but that was "not intended by the actor; not desired by a set of rules or an external observer; or that led
Human_error
Decision, action, or inaction by an aircraft pilot
Maraba Airport Belem Airport In aviation, pilot error generally refers to an action or decision made by a pilot that is a substantial contributing factor
Pilot_error
Sexual stimulation of one's own genitals
held that "the effort to achieve complete abstinence was a very serious error." The work of sexologist Alfred Kinsey during the 1940s and 1950s, most
Masturbation
Football match
The 2011 Football League One play-off final was an association football match which was played on 29 May 2011 at Old Trafford in Manchester, between Huddersfield
2011 Football League One play-off final
2011_Football_League_One_play-off_final
Fatal system error screen
(BSoD) – or blue screen error, blue screen, fatal error, bugcheck, and officially known as a stop error – is a critical error screen displayed in many
Blue_screen_of_death
Year used in some calendars
non-standard dates Time formatting and storage bugs Zero-based numbering Off-by-one error "Dionysius Exiguus. Liber de paschate sive cyclus paschalis". Archived
Year_zero
Scheme for controlling errors in data over noisy communication channels
most often by using an error correction code, or error correcting code (ECC). The redundancy allows the receiver not only to detect errors that may occur
Error_correction_code
Method of problem-solving
Trial and error is a fundamental method of problem-solving characterized by repeated, varied attempts which are continued until success, or until the
Trial_and_error
Detail of the global positioning system
range errors must be multiplied by the appropriate dilution of precision terms and then RSS'ed with the numerical error. Electronics errors are one of several
Error analysis for the Global Positioning System
Error_analysis_for_the_Global_Positioning_System
Family of linear error-correcting codes
linear error-correcting codes. Hamming codes can detect one-bit and two-bit errors, or correct one-bit errors without detection of uncorrected errors. By contrast
Hamming_code
Error-correcting codes
and coding theory, Reed–Solomon codes are a group of error-correcting codes that were introduced by Irving S. Reed and Gustave Solomon in 1960. They have
Reed–Solomon_error_correction
Play by William Shakespeare
The Comedy of Errors is one of William Shakespeare's earliest plays. It is his shortest and one of his most farcical comedies, with a major part of the
The_Comedy_of_Errors
Type of collectible coin
US error coins are error coins produced by the US government. There are three categories of error coins as provided by the American Numismatic Association
US_error_coins
Type of computing error
electronics and computing, a soft error is a type of error where a signal or datum is wrong. Errors may be caused by a defect, usually understood either
Soft_error
1979 studio album by Michael Jackson
Off the Wall is the fifth studio album by the American singer Michael Jackson, released on August 10, 1979, by Epic Records. It was Jackson's first album
Off_the_Wall
Process to create executable computer programs
conditions) and logic errors (such as division by zero or off-by-one errors). Robustness: how well a program anticipates problems due to errors (not bugs). This
Computer_programming
Obscene raising of the middle finger
off, is an obscene hand gesture. The gesture communicates moderate to extreme contempt, and is roughly equivalent in meaning to "fuck you", "fuck off"
The_finger
2025 legislation in the United States
can be off, this bill wouldn't be popular – let alone the most popular US bill ever signed – even with a massive and widespread polling error." The Atlantic
One_Big_Beautiful_Bill_Act
Topics referred to by the same term
Oboe, 1945 Allied campaign in Borneo Off-by-one error (OBOE), a type of computer programming or mathematical error This disambiguation page lists articles
OBOE
Control loop feedback mechanism
component responds to the current error value by producing an output that is directly proportional to the magnitude of the error. This provides immediate correction
PID_controller
Counting from "0" instead of "1" first
of this property, zero-based indexing potentially reduces off-by-one and fencepost errors. On the other hand, the repeat count n is calculated in advance
Zero-based_numbering
Programming tool for profiling, memory debugging and memory leak detection
feature enables Memcheck to detect off-by-one errors where a program reads or writes outside an allocated block by a small amount. The problems Memcheck
Valgrind
Self-correcting computer data storage
alpha particles emitted by contaminants in chip packaging material, but research has shown that the majority of one-off soft errors in DRAM chips occur as
ECC_memory
British television baking competition
The Great British Bake Off (often abbreviated to Bake Off or GBBO) is a British television baking competition, produced by Love Productions, in which
The_Great_British_Bake_Off
Security bug in the GNU Bash shell discovered in 2014
"CVE-2014-7186 vulnerable, redir_stack". Also found by Florian Weimer, CVE-2014-7187 is an off-by-one error in the Bash parser code, allowing out-of-bounds
Shellshock_(software_bug)
Error screen displayed after a fatal system error on a computer
encountering a critical system error. It gets its name from the black background seen during hardware or software errors. Since Windows 11 version 24H2
Black_screen_of_death
Canon error message
The E18 error is an error message on Canon digital cameras. The E18 error occurs when anything prevents the zoom lens from properly extending or retracting
E18_error
Ability of numerical algorithms to remain accurate under small changes of inputs
the "true" solution y. The main causes of error are round-off error and truncation error. The forward error of the algorithm is the difference between
Numerical_stability
Baseball statistic
error is an act, in the judgment of the official scorer, of a fielder misplaying a ball in a manner that allows a batter or baserunner to advance one
Fielding_error
High-level programming language first released in 1980
error. Ada also supports run-time checks to protect against access to unallocated memory, buffer overflow errors, range violations, off-by-one errors
Ada_(programming_language)
75th Formula One season
One World Championship Drivers' Champion: Max Verstappen Constructors' Champion: McLaren-Mercedes Previous 2023 Next 2025 Races by country Races by venue
2024 Formula One World Championship
2024_Formula_One_World_Championship
Design principles
but less severe for the one-off tasks performed in transcription and incrementation. A design maneuver is a change made by the designer in the notation
Cognitive dimensions of notations
Cognitive_dimensions_of_notations
Mathematical concept
value's scale, or as a relative error, which provides a scaled measure of the error by considering the absolute error in proportion to the exact data
Approximation_error
Linear feedback control system
with on–off controllers, where K p {\displaystyle K_{p}} is very high and hence, for even a small error, the controller output is driven from one extreme
Proportional_control
1999 aircraft accident in the Atlantic Ocean
when the light aircraft he was piloting crashed into the Atlantic Ocean off Martha's Vineyard, Massachusetts. Kennedy's wife, Carolyn Bessette Kennedy
1999 Martha's Vineyard plane crash
1999_Martha's_Vineyard_plane_crash
An error of impunity is a lapse in the justice system that results in criminals either remaining at large or receiving sanctions that are below a socially
Error_of_impunity
Bronze statue of a Texas Ranger
Swanson 2020, pp. 332–333. sfn error: multiple targets (2×): CITEREFSwanson2020 (help) Swanson 2020, p. 335. sfn error: multiple targets (2×): CITEREFSwanson2020
One_Riot,_One_Ranger
Preventable adverse effect of medical care
A medical error is a preventable adverse effect of care ("iatrogenesis"), whether or not it is evident or harmful to the patient. This might include an
Medical_error
vulnerable to problems from weather conditions, faulty design or human error. Some of the disasters below occurred during periods of conflict, although
List_of_maritime_disasters
Details of data storage in a spreadsheet application
not the numbers that it displays. Moreover, the error in Excel's answer is not simply round-off error, it is an effect in floating point calculations
Numeric precision in Microsoft Excel
Numeric_precision_in_Microsoft_Excel
In programming, detecting whether a variable is within given bounds before use
automatic bounds checking to raise speed. However, this leaves many off-by-one errors and buffer overflows uncaught. Many programmers believe these languages
Bounds_checking
Loss of precision in numerical analysis
These may be good approximations, in relative error, to the true lengths: the approximations are in error by less than 0.2% of the true lengths, | L 1 −
Catastrophic_cancellation
1996 aviation accident in the Atlantic Ocean
shortly after take-off from Puerto Plata's Gregorio Luperón International Airport, killing all 189 people on board. The cause was pilot error after receiving
Birgenair_Flight_301
American outlaw (1880–1911)
Svenvold 2003, pp. 27–28. sfn error: multiple targets (4×): CITEREFSvenvold2003 (help) Svenvold 2003, p. 28. sfn error: multiple targets (4×): CITEREFSvenvold2003
Elmer_McCurdy
stabilizer broke off. Loss of structural integrity during flight can be caused by: faulty design faulty maintenance manufacturing flaws pilot error weather conditions
List of aircraft structural failures
List_of_aircraft_structural_failures
Quote from Zelda II: The Adventure of Link
"I am Error" is a quote from the 1987 video game Zelda II: The Adventure of Link. The quote is spoken by a villager, apparently named Error, in the town
I_am_Error
Protocol for communicating routing information on the Internet
error Code: OPEN Message Error (2) Minor error Code (Open Message): Bad Peer AS (2) Bad Peer AS: 65200 KeepAlive messages are sent periodically, by both
Border_Gateway_Protocol
to pilot error, killing one of the 24 people on board. July 8 – Sudan Airways Flight 139, a Boeing 737-200, crashed shortly after taking off from Port
List of accidents and incidents involving commercial aircraft
List_of_accidents_and_incidents_involving_commercial_aircraft
Method used to begin play in ice hockey and some other sports
The linesmen are responsible for all other face-offs. One player from each team stands at the face-off spot (see below) to await the drop of the puck.
Face-off
Apple's general-purpose, open-source, compiled programming language
C-style enumeration for (int i = 0; i < c; i++), which is prone to off-by-one errors, is unsupported (from Swift 3 onward). The pre- and post- increment
Swift_(programming_language)
1985 aviation accident in Nevada
mainly caused by pilot error. While taking off from Reno, the aircraft suffered significant vibrations, which happened due to error by the ground crew
Galaxy_Airlines_Flight_203
Doom. identified off-screen as Fateh Singh Lakhawat Identified through a cross-promotion with the game of the same name. Cite error: The named reference
List of films with post-credits scenes
List_of_films_with_post-credits_scenes
76th Formula One season
with both the Ferrari drivers hitting the wall at the banked turn 3—one by driver error and the other due to contact with Antonelli—and with Norris experiencing
2025 Formula One World Championship
2025_Formula_One_World_Championship
Data storage technology
the maximum error rates being insufficient to guarantee a successful recovery, due to the high likelihood of such an error occurring on one or more remaining
RAID
In statistical hypothesis testing, the error exponent of a hypothesis testing procedure is the rate at which the probabilities of Type I and Type II decay
Error exponents in hypothesis testing
Error_exponents_in_hypothesis_testing
Football match
Division play-off final was an association football match contested by Gillingham and Swindon Town over two legs on 22 and 25 May 1987, followed by a replay
1987 Football League Third Division play-off final
1987_Football_League_Third_Division_play-off_final
Process of mapping a continuous set to a countable set
input value and its quantized value (such as round-off error) is referred to as quantization error, noise or distortion. A device or algorithmic function
Quantization (signal processing)
Quantization_(signal_processing)
2022 single album by Ateez
Spin Off: From the Witness is the first single album by South Korean boy band Ateez. It was released on December 30, 2022, through KQ Entertainment. The
Spin_Off:_From_the_Witness
Type of error
Team Error refers to errors that occur in settings where multiple people are working together. Dependency increases the likelihood of human error due to
Team_error
2025 EP by Yves
Soft Error is the third extended play by South Korean singer Yves. It was released by Paix Per Mil on August 7, 2025, and contains six tracks, including
Soft_Error
Algorithm in numerical analysis
numerical error in the total obtained by adding a sequence of finite-precision floating-point numbers, compared to the naive approach. This is done by keeping
Kahan_summation_algorithm
Association football match
The 2006 Football League One play-off final was an association football match which was played on 27 May 2006 between Barnsley and Swansea City at the
2006 Football League One play-off final
2006_Football_League_One_play-off_final
Aircraft runway accident
informally, runway overshoot). Runway excursions can happen because of pilot error, poor weather, or a fault with the aircraft. According to the Flight Safety
Runway_excursion
Woodblock print by Hokusai (1831)
The Great Wave off Kanagawa (Japanese: 神奈川沖浪裏, Hepburn: Kanagawa-oki Nami Ura; lit. 'Under the Wave off Kanagawa') is a woodblock print by the Japanese
The_Great_Wave_off_Kanagawa
Football match between Wycombe Wanderers and Oxford United
The 2020 EFL League One play-off final was a football match contested between Wycombe Wanderers and Oxford United to determine the third and final team
2020 EFL League One play-off final
2020_EFL_League_One_play-off_final
Linguistic deviation
pronunciation in a language, particularly one regarded as an error in morphology, while a solecism is an error in syntax. The label was originally applied
Barbarism_(linguistics)
Algorithmic technique
floating-point numbers that substantially reduces the accumulated round-off error compared to naively accumulating the sum in sequence. Although there are
Pairwise_summation
Errors on Xbox 360
pressed to turn it off. The problem was most prevalent in early models. This error code was usually caused by the failure of one or more hardware components
Xbox_360_technical_problems
Error caused by a memory fault
and errors refer to the incorrect recall, or complete loss, of information in the memory system for a certain detail and/or event. Memory errors may include
Memory_error
Binary feedback controller
hysteresis gap and inertia in the process, there will be an oscillating error signal around the desired set point value (e.g., temperature), often saw-tooth
Bang–bang_control
Urban legend based on a region in North Atlantic
reported position by the current. One of the most cited explanations in official inquiries as to the loss of any aircraft or vessel is human error. Human stubbornness
Bermuda_Triangle
Folklore
Shooting an apple off one's child's head, also known as the apple-shot (from German Apfelschuss), is a feat of marksmanship with a bow that occurs as
Shooting an apple off one's child's head
Shooting_an_apple_off_one's_child's_head
Rule of thumb used in aviation
miles then an error in track of one mile is approximately a 1° error in heading, and proportionately more for larger errors. The rule is used by pilots with
1_in_60_rule
Concept of having more than one person required to complete a task
has as its primary objective the prevention of fraud and errors. This objective is achieved by disseminating the tasks and associated privileges for a
Separation_of_duties
1957 aviation accident
either pilot error or technical failure, but also noted that the risks involved in take-off and landing should not be needlessly increased by carrying out
KLM_Flight_844
2D graphics library and associated API
made it easier for programmers to avoid graphical glitches caused by off-by-one errors. On the Macintosh, pixels were square, and a GrafPort had a default
QuickDraw
King of Egypt from 1936 to 1952
ISBN 978-0-88184-629-4. Morsy 1984, p. 195. sfn error: multiple targets (3×): CITEREFMorsy1984 (help) Morsy 1984, p. 194. sfn error: multiple targets (3×): CITEREFMorsy1984
Farouk_of_Egypt
Old printer error message in some operating systems
an outdated error message generated on some Unix and Unix-like computer operating systems in response to certain types of printer errors. lp0 is the Unix
Lp0_on_fire
American actress, comedian, and writer
Journeyman, Better off Ted, Happy Endings, Rizzoli & Isles, Mike & Molly, and New Girl, among others. Crisp also starred as Chloe, one of the contestants
Chelsey_Crisp
1914–1918 global conflict
forcing the Germans off the commanding heights, and closing towards the Belgian frontier. On 8 October, the Hindenburg Line was pierced by British and Dominion
World_War_I
General-purpose programming language
code can be linked into C projects by including the compiler-built headers. Error handling is handled through error types and can be handled with catch
Zig_(programming_language)
Practice in ancient Judaism
cursing instead of a blessing, by casting off the dust of your feet against them as a testimony, and cleansing your feet by the wayside. In 1831, a revelation
Shaking the dust from the feet
Shaking_the_dust_from_the_feet
Stamp printing error
appearance, but because some are quite rare, and highly valued by stamp collectors. Invert errors, or "inverts" for short, most commonly arise when producing
Invert_error
massacres carried out by Zionist forces.") harvnb error: no target: CITEREFSlater2020 (help); Shenhav 2019, p. 49, "750,000" harvnb error: no target: CITEREFShenhav2019
Palestinian genocide allegations
Palestinian_genocide_allegations
Motor racing championship
Gutiérrez endured a difficult introduction to Formula One, with a retirement due to driver error in China, a lowly eighteenth place in Bahrain and a string
2013 Formula One World Championship
2013_Formula_One_World_Championship
Palestine". The UN figure excludes autonomous region of Zanzibar. Cite error: A list-defined reference named "EU" is not used in the content (see the
List of countries by GDP (nominal) per capita
List_of_countries_by_GDP_(nominal)_per_capita
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
Male
Hawaiian
Hawaiian form of English Oscar, OKE means "god-spear."
Female
Norwegian
Danish and Norwegian form of Greek Hanna, ANE means "favor; grace."
Female
Hawaiian
Hawaiian name NOE means "mist; misty rain."
Female
French
Feminine form of French L�on, LÉONE means "lion."
Female
French
Feminine form of French L�on, LÉONIE means "lion."
Boy/Male
Anglo, British, English
Name of a King
Boy/Male
English, Modern
Sent by God
Surname or Lastname
Welsh
Welsh : nickname for a red-haired person (see Gough).English (of Cornish and Breton origin) : occupational name from Cornish and Breton goff ‘smith’ (cognate with Gaelic gobha). The surname is common in East Anglia, where it is of Breton origin, introduced by followers of William the Conqueror.Irish : reduced form of McGoff.Edward Goffe was a farmer in Cambridge MA whose house was acquired by Harvard College some time before 1654 and used as a dormitory, known as Goffe’s College.
Boy/Male
African, Dutch, French, German, Teutonic
Born on the Road
Male
English
Anglicized form of Hebrew Ben-Owniy, BEN-ONI means "son of my sorrow." In the bible, this is the name given to Benjamin by his mother Rachel as she died giving birth to him.
Surname or Lastname
English
English : topographic name for someone who lived by a boundary stone or a prominent outcrop of rock, from Middle English hÅn ‘stone’, ‘rock’. This is the same word as modern English hone ‘whetstone’, and the surname may also be a metonymic occupational name for someone who used a whetstone to sharpen swords, daggers, and knives.Dutch and North German (Höne) : from the Germanic personal name Huno, a short form of the various compound names with the first element hÅ«n. Compare, for example, Humphrey. The exact meaning of this element is disputed, but it may be cognate with Old Norse húnn ‘bear cub’.
Female
Scottish
Scottish form of Irish Gaelic Sláine, SLÀINE means "health."
Male
English
Pet form of English Anthony, possibly TONE means "invaluable."Â
Male
Scandinavian
Possibly a modern Scandinavian form of Old Danish Auwe, OVE means "little edge."Â
Female
English
 Variant spelling of English Oona, possibly ONA means "famine, hunger." Compare with another form of Ona.
Surname or Lastname
English (of Norman origin)
English (of Norman origin) : nickname meaning ‘good’, from Old French bon ‘good’.English : nickname for a thin man, from Middle English bÅn ‘bone’ (Old English bÄn; compare Bain 2).Hungarian (Bóné) : from bóné denoting a particular kind of fishing net, hence a metonymic occupational name for a fisherman or perhaps for a maker of such nets.
Female
French
Feminine form of French L�on, LÉONNE means "lion."
Girl/Female
Arabic
One of the Lovers
Surname or Lastname
English
English : variant of Rolfe.North German : variant of Ruoff.
Male
Greek
(Îῶε) Greek form of Hebrew Noach, NOE means "rest." In the bible, this is the name of the last antediluvian patriarch, the main character of the flood story.Â
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
Girl/Female
Tamil
Kunjalata | கà¯à®‚ஜலதா
Forest creeper, Wild climber plant
Male
Italian
Italian form of Latin Ignatius, possibly IGNAZIO means "unknowing."
Boy/Male
British, English
Jehovah has been Gracious; Variant of Jane
Girl/Female
Arabic, Muslim
Noble
Boy/Male
Indian
Sun; Poet; Lord Vishnu
Surname or Lastname
English
English : habitational name from places in Leicestershire, Surrey, and Sussex, so named from Old English stoc ‘dependent settlement’ + tūn ‘enclosure’, ‘settlement’.Israel Stoughton, who came to New England from England in about 1630, was one of the founders of Dorchester, MA, and became one of the largest landowners in the Massachusetts Bay Colony.
Girl/Female
Indian, Telugu
Goddess Saraswati
Female
Czechoslovakian
, life.
Girl/Female
Hindu, Indian, Kannada, Malayalam, Marathi, Sanskrit, Sindhi, Tamil, Telugu
Goddess Durga
Girl/Female
Greek American
Reap; from Therasia.
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
OFF BY-ONE-ERROR
pref.
Used in specifying adjacent dimensions; as, a cabin twenty feet by forty.
a.
Drawn by one horse; having but a single horse; as, a one-horse carriage.
a.
Out of the common path; aside; -- used in composition, giving the meaning of something aside, secondary, or incidental, or collateral matter, a thing private or avoiding notice; as, by-line, by-place, by-play, by-street. It was formerly more freely used in composition than it is now; as, by-business, by-concernment, by-design, by-interest, etc.
adv.
Near; in the neighborhood; present; as, there was no person by at the time.
adv.
Aside; as, to lay by; to put by.
a.
Past; gone by.
pref.
Near to, while passing; hence, from one to the other side of; past; as, to go by a church.
indef. pron.
Any person, indefinitely; a person or body; as, what one would have well done, one should do one's self.
prep.
Not on; away from; as, to be off one's legs or off the bed; two miles off the shore.
adv.
Passing near; going past; past; beyond; as, the procession has gone by; a bird flew by.
n.
One who goes by; a passer.
n.
A single unit; as, one is the base of all numbers.
v. t.
To cause to become one; to gather into a single whole; to unite; to assimilite.
a.
Growing on one side of a stem; as, one-sided flowers.
a.
Denoting a person or thing conceived or spoken of indefinitely; a certain. "I am the sister of one Claudio" [Shak.], that is, of a certain man named Claudio.
adv.
Denoting a different direction; not on or towards: away; as, to look off.
n.
One who, or that which, stands by one in need; something upon which one relies for constant use or in an emergency.
a.
Designating a time when one is not strictly attentive to business or affairs, or is absent from his post, and, hence, a time when affairs are not urgent; as, he took an off day for fishing: an off year in politics.
adv.
By limitation to the number one; for one time; not twice nor any number of times more than one.
pref.
With, as means, way, process, etc.; through means of; with aid of; through; through the act or agency of; as, a city is destroyed by fire; profit is made by commerce; to take by force.