weatherproof
1. [ adjective ] able to withstand exposure to weather without damage
Examples:

"weatherproof electric wiring" "a weatherproof coat"

Related terms: protected
2. [ verb ] make resistant to bad weather
Related terms: proof
Similar spelling:   Weatherford
  Weatherby
  Weatherbee
  waterproof
  weathervane
  weatherboard
  weather_vane
  waterproofed