/ Dictionary / Index D drownproof: Meaning and Definition of Find definitions for: drown•proof Pronunciation: (droun'prf"), [key] — v.t. to teach (a person) the technique of drownproofing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. drowned valley drownproofing 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