/ Dictionary / Index A airproof: Meaning and Definition of Find definitions for: air•proof Pronunciation: (âr'prf"), [key] — adj. impervious to air. —v.t. to make impervious to air. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. air pressure air pump Related Content Daily Word Quiz: winsome Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language