weathering

From Middle English wederyng, equivalent to weather +‎ -ing.

weathering (countable and uncountable, plural weatherings)

1. (obsolete) Weather, especially favourable or fair weather.
2. (geology) Mechanical or chemical breaking down of rocks in situ by weather or other causes.
3. (architecture) A slight inclination given to an approximately horizontal surface to enable it to throw off water.
4. The action of weather on objects exposed to it.

• space weathering
• weathering pan
• weathering steel

weathering

1. present participle and gerund of weather