/ Dictionary / Index W waterproofing: Meaning and Definition of Find definitions for: wa•ter•proof•ing Pronunciation: (wô'tur-pr"fing, wot'ur-), [key] — n. a substance by which something is made waterproof. the act or process of making something waterproof. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: waterproofing (Thesaurus) waterproof water rail Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language