waterproof

[ waw-ter-proof, wot-er- ]
/ ˈwɔ tərˌpruf, ˈwɒt ər- /

adjective

impervious to water.
rendered impervious to water by some special process, as coating or treating with rubber: a waterproof hat.

noun

Chiefly British. a raincoat or other outer coat impervious to water.
any of several coated or rubberized fabrics that are impervious to water.

verb (used with object)

to make waterproof.

Origin of waterproof

First recorded in 1730–40; water + -proof

OTHER WORDS FROM waterproof

wa·ter·proof·er, nounwa·ter·proof·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for waterproof

British Dictionary definitions for waterproof

waterproof
/ (ˈwɔːtəˌpruːf) /

adjective

not penetrable by waterCompare water-repellent, water-resistant

noun

mainly British a waterproof garment, esp a raincoat

verb (tr)

to make (a fabric, item of clothing, etc) waterproof
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012