Weatherproof means able to stand out in the rain and wind. A weatherproof jacket, weatherproof housing, weatherproof the shed.
It is a weaker claim than waterproof: weatherproof means it will keep out normal rain and wind, and waterproof means water will not get through at all. Manufacturers choose the word carefully for that reason. It works as a verb too.
1adjectiveweatherproofAble to stand out in the rain and wind.
“We bought a weatherproof cover for the garden furniture so it could stay outside all winter.”
weatherproof is a quality.
Proto-Indo-European
*h₂weh₁-
Proto-Indo-European
*wedʰrom
Proto-Germanic
*wedrą
Proto-West Germanic
*wedr
Old English
weder
Middle English
weder
English
weather
English, today
weatherproof
Built from
From weather + -proof. weather comes from Middle English weder, wedir, from Old English weder, from Proto-West Germanic wedr, from Proto-Germanic wedrą, from Proto-Indo-European wedʰrom (=we-dʰrom), from h₂weh₁- (“to blow”). 2 Cognate with Scots wather (“weather”), stq Weeder (“weather”), cim bèttar (“weather”), Dutch weder, weer (“weather”), German Wetter (“weather”), Low German Weder (“weather”), lb Wieder (“weather”), Yiddish וועטער (“weather”), Danish vejr (“weather”), Faroese -, Icelandic veður (“weather”), Norwegian Bokmål vær (“weather”), Norwegian Nynorsk veder, vêr (“weather”), Swedish väder (“weather”); also more distantly related to Russian вёдро (“fair weather”) and perhaps Albanian vrëndë (“light rain”).
Etymology from Wiktionary, CC BY-SA