/ Dictionary / Index V velocity: Meaning and Definition of Find definitions for: ve•loc•i•ty Pronunciation: (vu-los'i-tē), [key] — pl. -ties. rapidity of motion or operation; swiftness; speed: a high wind velocity. the time rate of change of position of a body in a specified direction. the rate of speed with which something happens; rapidity of action or reaction. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: velocity (Thesaurus) velocipede velocity microphone Related Content Daily Word Quiz: crutiny Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language