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Magnitude of velocity
In kinematics, the speed (commonly referred to as v) of an object is the magnitude of the change of its position over time or the magnitude of the change
Speed
Topics referred to by the same term
Look up speed in Wiktionary, the free dictionary. Speed is the rate of motion, change, or activity. Speed may also refer to: Speed (name), a list of people
Speed_(disambiguation)
Speed of electromagnetic waves in vacuum
The speed of light in vacuum, often called simply the speed of light and commonly denoted c, is a universal physical constant exactly equal to 299792458 m⋅s−1
Speed_of_light
Racing video game franchise
Need for Speed (NFS) is a racing game franchise published by Electronic Arts and currently developed by Criterion Games (the developers of the Burnout
Need_for_Speed
American influencer and streamer (born 2005)
Jason Watkins Jr. (born January 21, 2005), better known as IShowSpeed or simply Speed, is an American influencer, musician and online streamer. Watkins
IShowSpeed
Flying hybrid sports
flying speeds, and flightpaths descending close to a mountain slope. Speed flying and speed riding are very similar, but differ in that speed-flying is
Speed_flying_and_speed_riding
Speed of sound wave through elastic medium
The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium. More simply, the speed of sound
Speed_of_sound
World record for speed
A speed record is a world record for speed by a person, animal, or vehicle. The function of speed record is to record the speed of moving animate objects
Speed_record
Fastest rail-based transport systems
High-speed rail High-speed rail (HSR) is a type of rail transport network utilizing trains that run significantly faster than those of traditional rail
High-speed_rail
Maximum legal speed of vehicles
Speed limits on road traffic, as used in most countries, set the legal maximum speed at which vehicles may travel on a given stretch of road. Speed limits
Speed_limit
Welsh footballer and manager (1969–2011)
Gary Andrew Speed MBE (8 September 1969 – 27 November 2011) was a Welsh professional footballer and manager. As manager of Wales, he was often credited
Gary_Speed
Topics referred to by the same term
up speeder in Wiktionary, the free dictionary. Speeder may refer to: Railroad speeder, a small railcar Speeder (motor vessel), a 1908 launch Speeders (TV
Speeder
1994 action film by Jan de Bont
Speed is a 1994 American action thriller film directed by Jan de Bont in his feature directorial debut, and written by Graham Yost. Keanu Reeves, Dennis
Speed_(1994_film)
Standard terms to define airspeeds
In aviation, V-speeds are standard terms used to define airspeeds important or useful to the operation of all aircraft. These speeds are derived from
V_speeds
Motorcycle frame manufacturer and racing team from Italy
Speed Up is an Italian motorcycle racing team and constructor founded in 2010 and based in Vicenza, Italy. In 2012 the company started building its own
Speed_Up
Rate at which air moves from high- to low-pressure areas
In meteorology, wind speed, or wind flow speed, is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes
Wind_speed
Traffic calming device
Speed bumps are a class of traffic calming devices that use vertical deflection to slow motor-vehicle traffic in order to improve safety conditions. Speed
Speed_bump
Japanese anime television series
Speed Racer, also known as Mach GoGoGo (Japanese: マッハGoGoGo(ゴーゴーゴー), Hepburn: Mahha GōGōGō), is a Japanese anime television series produced by Tatsunoko
Speed_Racer
Topics referred to by the same term
Look up speed demon in Wiktionary, the free dictionary. Speed Demon may refer to: Speed Demon (Marvel Comics) Speed Demon (Amalgam Comics) Speed Demon (DC
Speed_Demon
2008 sports action film by the Wachowskis
Speed Racer is a 2008 American sports action comedy film written and directed by the Wachowskis, based on the 1966 manga series by Tatsuo Yoshida. The
Speed_Racer_(film)
2025 Chinese television series
Speed and Love (Chinese: 双轨; pinyin: Shuāng Guǐ; lit. 'Dual Track') is a 2025 Chinese television series starring Esther Yu and He Yu. Adapted from the
Speed_and_Love
Japanese-bred Thoroughbred racehorse
Speed Symboli (Japanese: スピードシンボリ, May 5, 1963 - May 31, 1989) was a Japanese racehorse and stud horse. In the late 1960s, he won the Tenno Sho (Spring)
Speed_Symboli
Measure of a photographic film's sensitivity to light
Film speed is the measure of a photographic film's sensitivity to light, determined by sensitometry and measured on various numerical scales, the most
Film_speed
Speed at which a body orbits around the barycenter of a system
systems, the orbital speed of an astronomical body or object (e.g. planet, moon, artificial satellite, spacecraft, or star) is the speed at which it orbits
Orbital_speed
Standard for computer data connections
Enhanced SuperSpeed System – while preserving the SuperSpeed architecture and protocol (SuperSpeed USB) – with an additional SuperSpeedPlus architecture
USB
Dimensionless quantity in fluid dynamics
equal to the speed of sound. At Mach 0.65, u is 65% of the speed of sound (subsonic), and, at Mach 1.35, u is 35% faster than the speed of sound (supersonic)
Mach_number
speed limits are set by each state or territory. States have also allowed counties and municipalities to enact typically lower limits. Highway speed limits
Speed limits in the United States
Speed_limits_in_the_United_States
Speed that exceeds five times the speed of sound (Mach 5 and above)
In aerodynamics, hypersonic speed refers to speeds much faster than the speed of sound, usually more than approximately Mach 5. The precise Mach number
Hypersonic_speed
Length of time when the film or digital sensor inside a camera is exposed to light
In photography, shutter speed or exposure time is the length of time that the film or digital sensor inside the camera is exposed to light (that is, when
Shutter_speed
Topics referred to by the same term
Look up high-speed in Wiktionary, the free dictionary. High Speed or high-speed may refer to: High Speed (1917 film), starring Jack Mulhall and Fritzi
High_Speed
Measure of turbomachinery speed
Specific speed Ns, is used to characterize turbomachinery speed. Common commercial and industrial practices use dimensioned versions which are of equal
Specific_speed
Speed that exceeds the speed of sound
Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F)
Supersonic_speed
Competitive form of ice skating
Types of speed skating are long-track speed skating, short-track speed skating, and marathon speed skating. In the Olympic Games, long-track speed skating
Speed_skating
fastest bird, and the fastest member of the animal kingdom, with a diving speed of over 300 km/h (190 mph). The fastest land animal is the cheetah. Among
Fastest_animals
Rate of travel of electric energy
The speed of electricity can refer to the velocity of an electron in various circumstances, the average velocity of multiple electrons in a conductor
Speed_of_electricity
connection speed for average and median data transfer rates for Internet access by end-users. The difference between average and median speeds is the way
List of countries by Internet connection speeds
List_of_countries_by_Internet_connection_speeds
Type of climbing
Speed climbing is a climbing discipline in which speed is the ultimate goal. Speed climbing is done on rocks, walls and poles and is only recommended for
Speed_climbing
British land and water speed record holder (1921–1967)
(23 March 1921 – 4 January 1967) was a British speed record breaker who broke eight absolute world speed records on water and on land in the 1950s and
Donald_Campbell
High-speed rail in China The high-speed rail (HSR, Chinese: 高铁; pinyin: Gāotiě) network in the People's Republic of China (PRC) is almost entirely owned
High-speed_rail_in_China
English actress (1899–1994)
Doris Speed (3 February 1899 – 16 November 1994) was an English actress, best known for her role as landlady of the Rovers Return Inn and later mayor
Doris_Speed
Nigerian singer, rapper, songwriter
Darlington Okoye Listen(born; March 13, 1984) popularly known as Speed Darlington, is a Nigerian rapper. He was born in Bronx, New York, USA, to musicians
Speed_Darlington
Concept in celestial mechanics
In celestial mechanics, escape velocity or escape speed is the minimum speed needed for an object to escape from contact with or orbit of a primary body
Escape_velocity
How quickly an object undergoes movement in a circular path
Tangential speed is the speed of an object undergoing circular motion, i.e., moving along a circular path. A point on the outside edge of a merry-go-round
Tangential_speed
Japanese high-speed rail system
colloquially known in English as the bullet train, is a network of high-speed railway lines in Japan. The system was developed to provide connections
Shinkansen
Fictional character and member of the Young Avengers
Speed (Thomas "Tommy" Shepherd) is a fictional superhero appearing in American comic books published by Marvel Comics. The character is depicted as a
Speed_(character)
2026 online trend
infiltration tactics would be an investigative piece rather than a viral speed run". Gizmodo described it as "this whole situation seems like it can just
Scientology_speedrunning
1974 video game
Speed Race is a 1974 arcade racing video game developed and manufactured by Taito and released under the titles Racer and Wheels in North America by distributor
Speed_Race
Propagation of information or matter faster than the speed of light
mass (i.e., photons) may travel at the speed of light, and that nothing may travel faster. Particles whose speed exceeds that of light (tachyons) have
Faster-than-light
Rate at which the phase of the wave propagates in space
The phase velocity of a wave is the speed of any wavefront, a surface of constant phase. This is the velocity at which the phase of any constant-frequency
Phase_velocity
High-speed rail (HSR) has developed in Europe as an increasingly popular and efficient means of transport. The first high-speed rail lines on the continent
High-speed_rail_in_Europe
Theory of interwoven space and time by Albert Einstein
with no acceleration). This is known as the principle of relativity. The speed of light in vacuum is the same for all observers, regardless of the motion
Special_relativity
Pre-pressed compact disc containing computer data
outer edge. The 1× speed rating for CD-ROM (150 Kbyte/s) is different from the 1× speed rating for DVDs (1.32 MB/s). When the speed at which the disc is
CD-ROM
Highest speed obtained from an air vehicle
An air speed record is the highest airspeed attained by an aircraft of a particular class. The rules for all official aviation records are defined by
List of flight airspeed records
List_of_flight_airspeed_records
Techniques claiming to improve the ability to read quickly
Speed reading is any of many techniques claiming to improve one's ability to read quickly. Speed-reading methods include chunking and minimizing subvocalization
Speed_reading
Unit of speed
The knot (/nɒt/) is a unit of speed equal to one nautical mile per hour, exactly 1.852 km/h (approximately 1.151 mph or 0.514 m/s). The ISO standard symbol
Knot_(unit)
Physics phenomenon affecting two wheeled vehicles
Speed wobble (also known as shimmy, tank-slapper, or death wobble) is a rapid side-to-side shaking of a vehicle's wheel(s) that occurs at high speeds
Speed_wobble
2023 single by Charli XCX
"Speed Drive" is a song by British singer Charli XCX from Barbie the Album, the soundtrack of the 2023 film Barbie. The song was released on 29 June 2023
Speed_Drive
Topics referred to by the same term
superhuman speed SuperSpeed, an advertising tagline of the USB 3.0 interface standard Super Speed (film), a 1925 silent comedy film Super Speeds, an Indian
Super_Speed
Topics referred to by the same term
Look up warp speed in Wiktionary, the free dictionary. Warp Speed may refer to: Warp speed, a speed of warp drives, especially fictional ones from Star
Warp_Speed
Triangular tool used by carpenters
A speed square, also called a rafter square, rafter angle square, and triangle square, is a multi-purpose triangular carpenters' tool used for marking
Speed_square
Speed limits in the United States vary depending on jurisdiction. Rural freeway speed limits of 70 to 80 mph (113 to 129 km/h) are common in the Western
Speed limits in the United States by jurisdiction
Speed_limits_in_the_United_States_by_jurisdiction
Piece of machine equipment
adjustable-speed motor drive is a motor drive that has multiple operating speeds, while a variable-speed motor drive is continuously variable in speed. If the
Motor_drive
Undersea rail tunnel linking France to the UK
designed for speeds up to 200 km/h (120 mph), trains are limited to a maximum speed of 160 km/h (99 mph) for safety reasons. It connects to high-speed railway
Channel_Tunnel
Brand of deodorant/antiperspirant
Speed Stick is an American brand of deodorant/antiperspirant produced by multinational healthcare company Colgate-Palmolive. It was formerly known as
Speed_Stick
Intercity rail service operated by Amtrak in the northeastern United States
traffic, and only reaches the maximum allowed speed of the tracks along some sections, with the fastest peak speed along segments between Mansfield, Massachusetts
Acela
Branch of dynamics concerned with studying the motion of air
layers. As aircraft speed increased designers began to encounter challenges associated with air compressibility at speeds near the speed of sound. The differences
Aerodynamics
Theoretical angular velocity that excites the natural frequency of a rotating object
In solid mechanics, in the field of rotordynamics, the critical speed is the theoretical angular velocity that excites the natural frequency of a rotating
Critical_speed
Expansion rate of a flame front in a combustion
flame speed and turbulent flame speed. Flame speed is typically measured in m/s, cm/s, etc. In an internal combustion engine, the flame speed of a fuel
Flame_speed
Professional wrestling streaming television program
WWE Speed is an American professional wrestling web series that was produced by WWE. The series featured wrestlers from WWE's Raw, SmackDown, and NXT
WWE_Speed
Press cameras made by Graflex from 1912 to 1973
The Speed Graphic was a press camera produced by Graflex in Rochester, New York. Although the first Speed Graphic cameras were produced in 1912, production
Speed_Graphic
Type of superhero possessing superhuman speed
relate to superhuman speed (also known as superspeed). The primary abilities shared by all speedsters include running at speeds far in excess of human
Speedster_(fiction)
Physical constant equal to the speed of light
field which it produces. In the relativistic sense, the "speed of gravity" refers to the speed of a gravitational wave, which, as predicted by general
Speed_of_gravity
Type of bicycle with a single gear ratio
A single-speed bicycle is a type of bicycle with a single gear ratio. These bicycles are without derailleur gears, hub gearing or other methods for varying
Single-speed_bicycle
American racing driver (born 1983)
Scott Andrew Speed (born January 24, 1983) is an American race car driver who has competed in numerous disciplines, including open-wheel, stock car, and
Scott_Speed
The following is a list of speed records for various types of vehicles. This list only presents the single greatest speed achieved in each broad record
List_of_vehicle_speed_records
Internet chess server
online tournaments, including Titled Tuesdays, the PRO Chess League, the Speed Chess Championships, PogChamps, Online Chess Olympiads, and computer vs
Chess.com
2024 studio album by DragonForce
Warp Speed Warriors is the ninth studio album by British power metal band DragonForce, released on 15 March 2024 through Napalm Records. It is the first
Warp_Speed_Warriors
American animated television series (1973)
Speed Buggy is an American animated television series, produced by Hanna-Barbera, which originally aired for one season on CBS from September 8, 1973
Speed_Buggy
American reference to a ship's true maximum speed
Flank speed is an American nautical term referring to a ship's true maximum speed but it is not equivalent to the term full speed ahead. Usually, flank
Flank_speed
3G mobile telecommunications protocols
High Speed Packet Access (HSPA) is an amalgamation of two mobile protocols—High Speed Downlink Packet Access (HSDPA) and High Speed Uplink Packet Access
High_Speed_Packet_Access
Flash memory card format
Speed (Default Speed/High Speed/UHS/SD Express)". SD Association. December 11, 2020. Retrieved January 7, 2025. "Bus Speed (Default Speed/ High Speed/
SD_card
Speed at which the wavelength of a vessel's bow wave is equal to the waterline length
speed or displacement speed is the speed at which the wavelength of a vessel's bow wave is equal to the waterline length of the vessel. As boat speed
Hull_speed
Planned passenger rail network in Canada
Alto (stylized in all caps), is a planned high-speed rail line in Canada, intended to connect major cities including Toronto, Ottawa, Montreal, and Quebec
Alto_(high-speed_rail)
2019 single by Gunna
"Speed It Up" is a song by American rapper Gunna, released on February 11, 2019 as the second single from his debut studio album Drip or Drown 2 (2019)
Speed_It_Up
2004 racing video game
Need for Speed: Underground 2 is a 2004 racing video game developed by EA Black Box and published by Electronic Arts. It is the eighth installment in
Need_for_Speed:_Underground_2
Airspeed limitation selected by the designer of the aircraft
In aviation, the maneuvering speed of an aircraft is an airspeed limitation at which the full deflection of the controls can be made at without risking
Maneuvering_speed
1999 video game
Speed Freaks (released as Speed Punks in North America) is a racing video game developed by Funcom and published by Sony Computer Entertainment for the
Speed_Freaks
British actress
Lucy Renee Speed (born 31 August 1976) is an English actress best known for her television roles as Natalie Evans in the BBC One soap opera EastEnders
Lucy_Speed
Rotation of Earth around its axis
The speed at any given latitude can be calculated by multiplying the equatorial speed by the cosine of the latitude. At the equator, the speed is about
Earth's_rotation
Rate of increase in wind strength per unit increase in height
In common usage, wind gradient, more specifically wind speed gradient or wind velocity gradient, or alternatively shear wind, is the vertical component
Wind_gradient
1970 song by Deep Purple
"Speed King" is a song by the English rock band Deep Purple, from their 1970 album Deep Purple in Rock. The song has been cited as an influence in the
Speed_King
High-speed rail in the United States dates back to the High-Speed Ground Transportation Act of 1965. Various state and federal proposals have followed
High-speed rail in the United States
High-speed_rail_in_the_United_States
2023 American film
Running with Speed is a 2023 documentary film about speedrunning directed by Patrick Lope and Nicholas Mross. It was written by Lope, Mross, and Summoning
Running_with_Speed
Baseball statistic
Speed Score, often simply abbreviated to Spd, is a statistic used in Sabermetric studies to evaluate a baseball player's speed. It was invented by Bill
Speed_Score
Racing series
dropped after 1996, leaving the class format as it would stand until 2010. Speed TV network began sponsoring the series in 1999. With fields growing, the
GT_World_Challenge_America
Type of physical exercise
Power walking or speed walking is the act of walking with a speed at the upper end of the natural range for the walking gait, typically 7 to 9 km/h (4
Power_walking
Aluminum tape for vehicle repairs
Speed tape is an aluminium pressure-sensitive tape used to perform minor repairs on aircraft and racing cars. It is used as a temporary repair material
Speed_tape
Rail traffic control systems used in the United Kingdom
operating at speeds faster than 125 mph (for example on High Speed 1) use an in-cab signalling system that automatically determines and calculates speed restrictions
UK_railway_signalling
Horizontal speed of an aircraft relative to the ground
Ground speed is the horizontal component of the velocity of an aircraft relative to the Earth’s surface, also referred to as "speed over the ground". It
Ground_speed
Topics referred to by the same term
Built for Speed may refer to: Built for Speed (Stray Cats album), a 1982 album by Stray Cats and its title track Built for Speed (Adam Brand album), a
Built_for_Speed
SPEED
SPEED
Boy/Male
Biblical
Speedy as a chariot.
Surname or Lastname
English
English : from Middle English, Old French faucon, falcun ‘falcon’, either a metonymic occupational name for a falconer, or a nickname for someone thought to resemble the falcon, which was regarded as a symbol of speed and courage in the Middle Ages. In a few cases, it may also have been a metonymic occupational name for a man who operated the piece of artillery named after the bird of prey. Compare Faulkner.In Louisiana, the name Falcón is borne by the descendants of Canary Islanders brought in to settle in 1779.
Girl/Female
Tamil
Gait, Speed, Path, Obedience, Success, Power of understanding obedience
Boy/Male
Hindu
Lord Hanuman, Speed like wind
Boy/Male
Hindu
Lord Hanuman, Speed like wind
Girl/Female
Hindu
The earth, Of the universe, Bestowed with speed
Girl/Female
Hindu
The earth, Of the universe, Bestowed with speed
Surname or Lastname
English
English : nickname for a fortunate person, from Middle English sped ‘success’, ‘good fortune’, ‘smooth progress’ (hence the modern meaning ‘swiftness’).English : from the derived sense of Middle English sped mentioned above, hence a nickname for a swift runner.Irish : Anglicization (part translation) of Gaelic Ó Fuada, from fuad ‘haste’ (see Foody).Translation of German and Ashkenazic Jewish Schnell.
Girl/Female
Indian
Gait, Speed, Path, Obedience, Success, Power of understanding obedience
Boy/Male
Tamil
Uddiyan | உதà¯à®¤à¯€à®¯à®¨
Flying speed
Uddiyan | உதà¯à®¤à¯€à®¯à®¨
Girl/Female
Tamil
The earth, Of the universe, Bestowed with speed
Surname or Lastname
Irish (Ulster)
Irish (Ulster) : Anglicized form of Gaelic Ó hÃr, meaning ‘long-lasting’. In Ireland this name is found in County Armagh; it has also long been established in Scotland.Irish : Anglicized form of Ó hAichir ‘descendant of Aichear’, a personal name derived from the epithet aichear ‘fierce’, ‘sharp’. In Ireland this name is more commonly Anglicized as O’Hehir.English : nickname for a swift runner (possibly a speedy messenger) or a timorous person, from Middle English hare ‘hare’. However, the surname Ayer and its variants was sometimes recorded as Hare.English : topographic name from an Old English hær ‘rock’, ‘heap of stones’, ‘tumulus’.French : according to Morlet, an occupational name for a huntsman, from a medieval French call used to urge on the hounds, or, in the form Haré, from the past participle of harer ‘to excite, stir up (hounds in pursuit of a quarry)’.
Surname or Lastname
English
English : from the personal name Asti, a pet form of the Norman personal name Asketin, derived from Old Norse Ãsketill, composed of the elements áss ‘god’ + ketill ‘kettle’, ‘helmet’. Compare Haskell.English : from Middle English, Old French hasti ‘quick’, ‘speedy’, a nickname for a brisk or impetuous person, or possibly for a messenger.
Girl/Female
Tamil
The earth, Of the universe, Bestowed with speed
Boy/Male
Tamil
Manojavaya | மநோஜவாயா
Lord Hanuman, Speed like wind
Manojavaya | மநோஜவாயா
Surname or Lastname
English
English : from the expression ‘God speed (you)’; a wish for success for one setting out on an enterprise, presumably applied as a nickname for someone who habitually used this expression.
Girl/Female
Hindu
The earth, Of the universe, Bestowed with speed
Girl/Female
Tamil
The earth, Of the universe, Bestowed with speed
Boy/Male
Tamil
Manojavam | மநோஜவமÂ
Lord Hanuman, Speed like wind
Manojavam | மநோஜவமÂ
Surname or Lastname
English
English : occupational name for a peddler or hawker, Middle English packeman.English : occupational name for the servant (Middle English man) of someone called Pack.German (Packmann, Päckmann), Dutch (Pakman), and Jewish (Ashkenazic) : occupational name for a packer (one who packed goods for shipping) or alternatively a rider or driver of pack animals, used for carrying comparatively light quantitites of goods at high speed, from a derivative of packen ‘to pack’.German : variant of Pach 1, 2.
SPEED
SPEED
Boy/Male
Arabic, Muslim
Care of the Most Gracious Allah
Boy/Male
American, British, English
Son of Gar
Male
Italian
Masculine form of Italian Concetta, CONCETTO means "conception."
Boy/Male
Indian, Punjabi, Sikh
Sapphire Warrior
Boy/Male
Indian
Lord Siva and Lord Rama
Boy/Male
Muslim
Intelligent, Brilliant
Boy/Male
Hindu
Girl/Female
Hindu, Indian
Beautiful Flower Called Champa
Boy/Male
Celebrity, Gujarati, Hindu, Indian, Malayalam, Mythological, Sanskrit, Traditional
A Cow-herd; Protector of Cows
Boy/Male
Arabic
Seas; Oceans; Noble and Great Men
SPEED
SPEED
SPEED
SPEED
SPEED
adv.
In a speedy manner.
n.
One who, or that which, speeds.
n.
A genus scrophulariaceous plants; the speedwell. See Speedwell.
n.
The act or state of moving swiftly; swiftness; velocity; rapidly; rate of motion; dispatch; as, the speed a horse or a vessel.
v. t.
To run with speed; to run or move in a quick, hurried manner; to hasten away.
superl.
Not dilatory or slow; quick; swift; nimble; hasty; rapid in motion or performance; as, a speedy flight; on speedy foot.
p. pr. & vb. n.
of Speed
n.
Quickness of motion; swiftness; speed; celerity; rapidity; as, the velocity of wind; the velocity of a planet or comet in its orbit or course; the velocity of a cannon ball; the velocity of light.
n.
A ship or other vessel; -- with qualifying words descriptive of speed or manner of sailing; as, a heavy sailer; a fast sailer.
adv.
In a speedful manner.
a.
Full of speed (in any sense).
a.
Being without speed.
n.
The quality or state of being speedy.
n.
The quality or state of being transitory; speedy passage or departure.
v. t.
To cause to make haste; to dispatch with celerity; to drive at full speed; hence, to hasten; to hurry.
n.
An apparatus for measuring speed, as of machinery or vessels, but especially of projectiles.
n.
One who, or that which, causes or promotes speed or success.
n.
Rate of motion; the relation of motion to time, measured by the number of units of space passed over by a moving body or point in a unit of time, usually the number of feet passed over in a second. See the Note under Speed.