/ Dictionary / Index L launch vehicle: Meaning and Definition of Find definitions for: launch' ve"hicle Pronunciation: [key] a rocket used to launch a spacecraft or satellite into orbit or a space probe into space. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. launch pad launch window Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language