Rain proofing

rainproof

[reyn-proof]
adjective
1.
impervious to rain; keeping out or unaffected by rain: a rainproof cover; a rainproof coat.
verb (used with object)
2.
to make rainproof.

Origin:
1825–35; rain + -proof

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
rainproof (ˈreɪnˌpruːf)
 
adj
1.  Also: raintight (of garments, materials, buildings, etc) impermeable to rainwater
 
vb
2.  (tr) to make rainproof

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