[waw-ter-proof, wot-er-]
  1. Chiefly British. a raincoat or other outer coat impervious to water.
  2. any of several coated or rubberized fabrics that are impervious to water.
verb (used with object)
  1. to make waterproof.

Origin of waterproof

First recorded in 1730–40; water + -proof
Related formswa·ter·proof·er, nounwa·ter·proof·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for water-proofed

Historical Examples of water-proofed

British Dictionary definitions for water-proofed


  1. not penetrable by waterCompare water-repellent, water-resistant
  1. mainly British a waterproof garment, esp a raincoat
verb (tr)
  1. 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

Word Origin and History for water-proofed



1725, from water (n.1) + proof. The verb is first recorded 1843. Related: Waterproofed; waterproofing.

Online Etymology Dictionary, © 2010 Douglas Harper