The state of the air or atmosphere with respect to heat or cold, wetness or dryness, calm or storm, clearness or cloudiness, or any other meteorological phenomena; meteorological condition of the atmosphere; as, warm weather; cold weather; wet weather; dry weather, etc.(noun)
change under the action or influence of the weather(verb.change)
Example: A weathered old hut.
source: wordnet30
To expose to the air; to air; to season by exposure to air.(verb)
source: webster1913
To undergo or endure the action of the atmosphere; to suffer meteorological influences; sometimes, to wear away, or alter, under atmospheric influences; to suffer waste by weather.(verb)