- Speed is a way of measuring how quickly something is moving or being done, or something moving fast.
- An example of speed is a car being driven 45 miles per hour.
- An example of speed is someone cleaning a room in 10 minutes.
- An example of speed is how quickly a jaguar runs.
- Speed is a slang term for the street drug methamphetamine.
An example of speed is a drug that increases energy, heart rate and makes it very difficult to eat or sleep.
- Speed is defined as to help someone or something along, or move too quickly.
- An example of speed is a restaurant hostess putting regular customers at the top of a table waiting list.
- An example of speed is driving 80 mph in a 50 mph zone.
A sign shows this cars speed.
- the act or state of moving rapidly; swiftness; quick motion
- the rate of movement or motion; velocity (sense )
- the magnitude of a velocity (sense )
- the rate or rapidity of any action: reading speed
- a gear or arrangement of gears for the drive of an engine or bicycle: a truck with five forward speeds
- Informal one's kind or level of taste, capability, etc.
- ☆ Slang any of various amphetamine compounds, esp. methedrine
- Archaic luck; success; prosperity: to wish someone good speed
- the sensitivity of film to light, expressed in various numerical scales
- the widest effective aperture of a camera lens
- the length of time the shutter is opened for an exposure
Origin of speedMiddle English sped ; from Old English spæd, wealth, power, success, akin to spowan, to prosper, succeed ; from Indo-European base an unverified form spēi-, to flourish, expand from source space, spare
intransitive verbsped or speeded, speeding
- to move rapidly, esp. more rapidly than is safe or allowed by law
- to get along; fare
- to have fortune, good or bad
- to have good fortune; prosper; succeed
- to help (a project) to succeed; aid; promote
- to wish Godspeed to: to speed the parting guest
- to send, convey, or cause to move, go, etc. swiftly: to speed a letter on its way
- to cause or design (a machine, etc.) to operate at a certain speed or speeds
- Archaic to cause to succeed or prosper
up to speed
- working or operating at full speed, maximum efficiency, etc.
- Informal fully informed or having enough information
- Physics The rate or a measure of the rate of motion, especially:a. Distance traveled divided by the time of travel.b. The limit of this quotient as the time of travel becomes vanishingly small; the first derivative of distance with respect to time.c. The magnitude of a velocity.
- Swiftness of action: He wrote the first chapter with great speed.
- a. The act of moving rapidly: finished the race in a burst of speed.b. The state of being in rapid motion; rapidity: The river's speed made a rescue difficult.
- A transmission gear or set of gears in a motor vehicle: What speed is the car in now?
- a. A numerical expression of the sensitivity of a photographic film, plate, or paper to light.b. The capacity of a lens to accumulate light at an appropriate aperture.c. The length of time required or permitted for a camera shutter to open and admit light.
- Slang A stimulant drug, especially amphetamine or methamphetamine.
- Slang One that suits or appeals to a person's inclinations, skills, or character: Living in a large city is not my speed.
- Archaic Prosperity; luck.
verbsped sped or speed·ed, speed·ing, speeds
- a. To go, move, or proceed quickly: sped to the rescue.b. To drive at a speed exceeding a legal limit: was speeding on the freeway.
- To pass quickly: The days sped by. The months have sped along.
- To move, work, or happen at a faster rate; accelerate: His pulse speeded up.
- Slang To be under the influence of a stimulant drug.
- Archaic a. To prove successful; prosper.b. To get along in a specified manner; fare.
- To cause to move or proceed quickly; hasten: no wind to speed the boat.
- To increase the speed or rate of; accelerate. Often used with up: speed up a car; sped up production.
- To further, promote, or expedite (a legal action, for example).
- Archaic To help to succeed or prosper; aid.
Origin of speedMiddle English spede, from Old English spēd, success, swiftness; see spē- in Indo-European roots.
- the state of moving quickly or the capacity for rapid motion; rapidity
- How does Usain Bolt run at that speed?
- the rate of motion or action, specifically (mathematics)/(physics) the magnitude of the velocity; the rate distance is traversed in a given time
- (photography) the sensitivity to light of film, plates or sensor.
- (photography) the duration of exposure, the time during which a camera shutter is open.
- (photography) the largest size of the lens opening at which a lens can be used.
- (photography) the ratio of the focal length to the diameter of a photographic objective.
- (slang) any amphetamine drug used as a stimulant, especially illegally, especially methamphetamine
- (archaic) luck, success, prosperity
From Middle English spede (“prosperity, good luck, quickness, success”), from Old English spēd (“luck, prosperity, success”), from Proto-Germanic *spōdiz (“prosperity, success”), from Proto-Germanic *spōaną (“to prosper, succeed, be happy”), from Proto-Indo-European *spē-, *spʰē- (“to prosper, turn out well”). Cognate with Scots spede, speid (“success, quickness, speed”), Dutch spoed (“haste; speed”), Low German spood (“haste, speed”), German Sput (“progress, acceleration, haste”). Related also to Old English spōwan (“to be successful, succeed”), Albanian shpejt (“to speed, to hurry”) and Russian спешить (sp'éšit', “to hurry”).
(third-person singular simple present speeds, present participle speeding, simple past and past participle sped (especially US) or speeded (mostly UK))
- (intransitive, archaic) To succeed; to prosper, be lucky.
- (archaic) To help someone, to give them fortune.
- God speed, until we meet again.
- (intransitive) To go fast.
- The Ferrari was speeding along the road.
- (intransitive) To exceed the speed limit.
- Why do you speed when the road is so icy?
- To increase the rate at which something occurs.
- (intransitive, slang) To be under the influence of stimulant drugs, especially amphetamines.
- The Cambridge Guide to English Usage indicates that sped is for objects in motion (the race car sped) while speeded is used for activities or processes, but notes that the British English convention does not hold in American English.
- Garner's Modern American Usage (2009) indicates that speeded is incorrect, except in the phrasal verb, speed up. Most American usage of speeded conforms to this.
- Sped is about six times more common in American English (COCA) than speeded. Sped is twice as common in UK English (BNC).
- deeps, pedes, spede
From Middle English speden, from Old English spēdan (“to speed, prosper, succeed, have success”), from Proto-Germanic *spōdijanan (“to succeed”). Cognate with Scots spede, speid (“to meet with success, assist, promote, accomplish, speed”), Dutch spoeden (“to hurry, rush”), Low German spoden, spöden (“to hasten, speed”), German sputen, spuden (“to speed”).