Rainwater

Alternative forms

• rain water

Origin

From Middle English reinwater, from Old English reġnwæter ("rainwater"), equivalent to rain + water. Cognate with Dutch regenwater ("rainwater"), German Regenwasser ("rainwater"), Swedish regnvatten ("rainwater").

Full definition of rainwater

Noun

1. Rainfall.
2. Water (for a house etc) sourced from rain which has not joined a spring, stream or river, pond, lake or sea.