1 [U,sing.] water that falls from the clouds in separate drops:
There will be rain in all parts tomorrow. * Rain is forecast for the weekend. * Don't go out in the rain. * It's pouring with rain (= raining very hard). * heavy / torrential / driving rain * The rain poured down. * It looks like rain (= as if it is going to rain). * A light rain began to fall. * I think I felt a drop of rain.
seealsoACIDRAIN, RAINY -< WEATHER
2 (the rains) [pl.] the season of heavy continuous rain in tropical countries:
The rains come in September.
3 [sing.] ~ of sth a large number of things falling from the sky at the same time:
a rain of arrows / stones
IDIOMS
come rain, come shine
