NounSpeed (plural Speeds)
- the state of moving quickly or the capacity for rapid motion; rapidity
- the rate of motion or action, specifically (mathematics)/(physics) the magnitude of the velocity; the rate distance is traversed in a given time
- (velocity) distance traveled per unit time
- swiftness, fastness (a rate (usually rapid) at which something happens) "the project advanced with gratifying speed"
- hurrying (changing location rapidly)
- (photography)the ratio of the focal length to the diameter of a (camera) lens system)
- (slang) any amphetamine drug used as a stimulant, especially illegally, especially methamphetamine (a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression)
- (archaic) luck, success, prosperity
- (intransitive, archaic) To succeed; to prosper, be lucky.
- (transitive, archaic) To help someone, to give them fortune.
- (intransitive) To go fast, especially excessively fast.
- (intransitive) To exceed the speed limit.
- (transitive) To increase the rate at which something occurs
Adjectives for Acceleration
considerable; impressive; breath-taking; effortless; violent; dependable; superior; furious; imagined; convenient; breakneck; impressive; wonted; requisite; initial; amazing; thrilling; noiseless; specified; railway; evil; frightful; uninterrupted; incredible; utmost; high; accelerated; desired; fabulous; surprising; sufficient; diminished; careless; incredible; flashing; electric; lightning; moderate; reasonable; sustained; intoxicating; bidding.
Verbs for Acceleration
accelerate—; arrest—; attain—; check—; curb—; diminish—; exceed—; gauge—; goad to—; maintain—; moderate—; propel at—; regale—; slacken—; spur to—; sustain —; throttle—; urge—; —alarms; —endangers; —exhilarates; —facilitates; —intoxicates; —jeopardizes; —menaces; —outstrips ; —spurts.
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 *spōanan (“to prosper, succeed, be happy”), from Proto-Indo-European *spē-/ *spʰē- (“to prosper, turn out well”). Cognate with Dutch spoed (“speed”), German sputen (“to speed”), Old English spōwan (“to be successful, succeed”).
Usage note 1
- knot (kt or kn)
- imperial and U.S. customary:
Usage note 2
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.