waterproof

[ waw-ter-proof, wot-er- ]

adjective

1. impervious to water.
2. rendered impervious to water by some special process, as coating or treating with rubber:

   a waterproof hat.

noun

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.

waterproof

/ ˈwɔːtəˌpruːf /

adjective

1. not penetrable by water Compare water-repellent water-resistant

noun

1. a waterproof garment, esp a raincoat

verb

1. to make (a fabric, item of clothing, etc) waterproof

Other Words From

• water·proofer noun
• water·proofness noun

Word History and Origins

Origin of waterproof¹

First recorded in 1730–40; water + -proof

Example Sentences

Freeman’s idea for greater technological transparency started with a handful of waterproof pages he posted around his Alabama neighborhood.

From Los Angeles Times

It has a 400-Lumen max output, but is still slim and lightweight, not to mention waterproof.

From Los Angeles Times

At the hotel, I dumped sand out of my trail runners, washed my light running shirt, waterproof sun shirt, hiking shorts and breathable socks in the sink and hung them out to dry on my hotel balcony.

From Los Angeles Times

Mr Conway is believed to be wearing a green Paracore waterproof jacket with a hood, camouflage green shorts and walking boots.

From BBC

Most single-use cups are paper, but are lined with plastic to make them waterproof.

From BBC

Related Words

• rainproof