(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.

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

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

A cloud from which rain is falling or may fall.

(Australia, Canada, India, New Zealand, UK) rain check

(idiomatic) to rain heavily.

(idiomatic) Any voucher or note from a merchant to a customer to provide an item the merchant has run out of at a later date for the item's current price, or (in a more literal sense) to provide a service at a later date.