Pronunciation: (wô'tur-prOOf", wot'ur-), [key]
1. impervious to water.
2. rendered impervious to water by some special process, as coating or treating with rubber: a waterproof hat.
1. Chiefly Brit.a raincoat or other outer coat impervious to water.
2. any of several coated or rubberized fabrics that are impervious to water.
to make waterproof.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.