[rain] n, often attrib [ME reyn, fr. OE regn, ren; akin to OHG regan rain] (bef. 12c) 1 a: water falling in drops condensed from vapor in the atmosphere b: the descent of this water c: water that has fallen as rain: rainwater
2. a: a fall of rain: rainstorm b pl: the rainy season
3: rainy weather
4: a heavy fall of particles or bodies
[2]rain vi (bef. 12c) 1: to send down rain
2: to fall as water in drops from the clouds
3: to fall like rain ~ vt 1: to pour down
2: to bestow abundantly -- rain cats and dogs : to rain heavily