Moisture; a liquid, liquor, drink.

In plural. Falls of rain; episodes or periods of rainfall. Also with the: rainfalls collectively.

A single drop of rain.

(With plural) A burst, storm, downpour, shower, or spell of rain.

Scottish and English regional (northern). A fall of rain or snow; (occasionally) snowfall.

Falling rain; the occurrence of this; fallen rain, rainwater.

As a count noun: a fall or shower of rain; a period of rain; an amount of rainwater from such a fall or falls. Also in extended use.