/ Dictionary / Index V vapor trail: Meaning and Definition of Find definitions for: va'por trail" Pronunciation: [key] contrail. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. vapor tension vaporware Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language