Rain  —n. 1 a condensed atmospheric moisture falling in drops. B fall of such drops. 2 (in pl.) A (prec. By the) rainy season. B rainfalls. 3 a falling liquid or solid particles or objects. B rainlike descent of these. —v. 1 (prec. By it as subject) rain falls. 2 a fall like rain. B (prec. By it as subject) send in large quantities. 3 send down like rain; lavishly bestow (rained blows upon him). 4 (of the sky, clouds, etc.) Send down rain.  rain off (or us out) (esp.