'Weatherproof' definitions:

Definition of 'weatherproof'

From: WordNet
adjective
Able to withstand exposure to weather without damage; "weatherproof electric wiring"; "a weatherproof coat"
verb
Make resistant to bad weather

Definition of 'Weatherproof'

From: GCIDE
  • Weatherproof \Weath"er*proof`\, a. Proof against rough weather. [1913 Webster]