Possible Definitions:
1. Rain (n.) Water falling in drops from the clouds; the descent of water from the clouds in drops.
2. Rain (n.) To fall in drops from the clouds, as water; -- used mostly with it for a nominative; as, it rains.
3. Rain (n.) To fall or drop like water from the clouds; as, tears rained from their eyes.
4. Rain (v. t.) To pour or shower down from above, like rain from the clouds.
5. Rain (v. t.) To bestow in a profuse or abundant manner; as, to rain favors upon a person.