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

They form weirdly impenetrable firefighting foam; they also give us waterproof mascara, rainproof tents, leakproof burger wrappers, and nonstick pans.

From Slate • Jul. 30, 2022

Rainy day essentials: Neutral-colored trenchcoat, waterproof tote, rainproof booties and an umbrella with a fun, feminine print.

From Seattle Times • Mar. 1, 2017

However, during a recent trip to Scotland, the rain and wind drove him inside — to a store where he purchased a wind- and rainproof North Face jacket.

From Washington Post • Aug. 6, 2015

This season the rainproof boot took on stacked high heels, and also appeared in a calf-length version with a wedge platform.

From US News • Feb. 23, 2015

The Banded Epeira and the Silky Epeira, those experts in the manufacture of rainproof textures, lay their eggs high up, on brushwood and bramble, without shelter of any kind. 

From The Life of the Spider by Teixeira de Mattos, Alexander