/ Dictionary / Index A all-terrain vehicle: Meaning and Definition of Find definitions for: all'-ter•rain' ve"hicle Pronunciation: (ôl'tu-rān'), [key] a vehicle with treads, wheels, or both, designed to traverse varied, uneven terrain as well as roads. Abbr.: ATV Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. all-terrain bike. All the King's Men* Related Content Daily Word Quiz: candor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language