from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Any of the chemical or mechanical processes by which rocks exposed to the weather undergo changes in character and break down.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Weather, especially favourable or fair weather.
- n. Mechanical or chemical breaking down of rocks in situ by weather or other causes.
- n. A slight inclination given to an approximately horizontal surface to enable it to throw off water.
- v. Present participle of weather.
from the GNU version of the Collaborative International Dictionary of English
- n. The action of the elements on a rock in altering its color, texture, or composition, or in rounding off its edges.
from The Century Dictionary and Cyclopedia
- n. Weather, especially favorable or fair weather.
- n. In geology, etc., the action of the elements in changing the color, texture, or composition of rock, in rounding off its edges, or gradually disintegrating it.
- n. In architecture, a slight inclination given to an approximately horizontal surface to enable it to throw off water.
From Middle English wederyng, equivalent to weather + -ing. (Wiktionary)