/ Dictionary / Index V vent pipe: Meaning and Definition of Find definitions for: vent' pipe" Pronunciation: [key] — Plumbing. Plumbing. a pipe above a waste pipe or soil pipe that allows gas to escape from the system. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. ventose ventr- Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language