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say it: speed
speed is a noun and verb meaning "distance travelled per unit time". It carries 10 recorded senses.
distance travelled per unit time
a rate (usually rapid) at which something happens
“the project advanced with gratifying speed”
changing location rapidly
the ratio of the focal length to the diameter of a (camera) lens system
a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
move hurridly
“He rushed down the hall to receive his guests”
“The cars raced down the street”
Forms marked · are formed by the regular rule rather than recorded in the source data. English keeps a few hundred irregulars and the rest follow the pattern, so the rule is right far more often than not — but it is a rule, and the mark says so.
Definitions, synonyms and semantic relations for speed come from Princeton University’s WordNet. The pronunciation comes from the CMU Pronouncing Dictionary. Commonness is measured against a corpus of everyday English. Full sources and licences.