(idiomatic) To rain heavily

Rain which is unusually acidic (pH of less than the natural range of 5 to 6); caused mainly by atmospheric pollution with sulphur dioxide, carbon dioxide and nitrogen compounds.

A tropical American tree (Albizia saman) having bipinnate leaves, globose clusters of flowers with crimson stamens, and sweet-pulp pods eaten by cattle, also used as an ornamental.

(meteorology) An area of diminished precipitation on the lee side of mountains.

(derogatory) An autistic, or mentally and/or socially impaired person. / (derogatory) A non-autistic or impaired person whose mannerisms are similar to such people. / (humorous) An expert at something.

A man who is believed to have power to control the rain. / A spirit of the rain.

Alternative spelling of sulfur rain

Rain that has a pale yellow colour caused by impurities picked up by the falling raindrops.

The interruption of an outdoor event because of rain, with the expectation that it would continue later.

plural of rain cloud