rainproof

American  

[reyn-proof] / ˈreɪnˌpruf /

adjective

1. impervious to rain; keeping out or unaffected by rain.

   a rainproof cover; a rainproof coat.

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verb (used with object)

1. to make rainproof.

rainproof British  

/ ˈreɪnˌpruːf /

adjective

1. Also: raintight.  (of garments, materials, buildings, etc) impermeable to rainwater

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verb

1. (tr) to make rainproof

Etymology

Origin of rainproof

First recorded in 1825–35; rain + -proof

Example Sentences

If you want something more rainproof, consider a roofed or louvered structure that can open and close depending on the weather.

From Seattle Times

Unisex styles, including baseball caps, berets and bucket hats, come in updated new materials - including a spotted cow print, black patent leather and rainproof nylon.

From Washington Times

Unisex styles, including baseball caps, berets and bucket hats, come in updated new materials – including a spotted cow print, black patent leather and rainproof nylon.

From Seattle Times

The keypad, which has an LED backlight, will use two AA batteries that need to be replaced twice a year and are rainproof with an IPX5 rating.

From The Verge

Perhaps they’ll have developed a way to rainproof ice surfaces by the time our city gets around to seriously bidding on an outdoor game.

From Seattle Times