weathering

Any of the chemical or mechanical processes by which objects exposed to the weather are worn or broken down.

Weather, especially favorable or fair weather.

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.

In architecture, a slight inclination given to an approximately horizontal surface to enable it to throw off water.

The action of the elements on a rock in altering its color, texture, or composition, or in rounding off its edges.