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rainproof

American  
[reyn-proof] / ˈreɪnˌpruf /

adjective

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

    a rainproof cover; a rainproof coat.

verb (used with object)

  1. to make rainproof.

rainproof British  
/ ˈreɪnˌpruːf /

adjective

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

"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

verb

  1. (tr) to make rainproof

"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

Etymology

Origin of rainproof

First recorded in 1825–35; rain + -proof

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.