Waterproof

Origin

water + -proof

Full definition of waterproof

Adjective

1. Unaffected by water.
2. Made of or covered with material that doesn't allow water in.

Verb

1. To make waterproof or water-resistant.
• 2013-08-03, Yesterday’s fuel, The dawn of the oil age was fairly recent. Although the stuff was used to waterproof boats in the Middle East 6,000 years ago, extracting it in earnest began only in 1859 after an oil strike in Pennsylvania. The first barrels of crude fetched $18 (around $450 at today’s prices).

Noun

1. A substance or preparation for rendering cloth, leather, etc., impervious to water.
2. Cloth made waterproof, or any article made of such cloth, or of other waterproof material, as rubber; especially, an outer garment made of such material.----