A rain gauge is a container that measures how much rain has fallen. Empty the rain gauge.
The width does not matter, since the depth collected is the same in any straight-sided pot. A rain gauge must stand clear of trees and walls or the reading means nothing.
1nounrain gaugeA container that measures how much rain has fallen.
“The rain gauge held two inches after one night.”
rain gauge is an instrument.
Practised in Weather & Seasons