Definition of "rain down"

rain down

verb
third-person singular simple present rains down, present participle raining down, simple past and past participle rained down
1. (intransitive) To fall from the sky as, or like, rain.
2. (transitive) To let fall as, or like, rain.
3. (intransitive, with on or upon) To strike (literally or figuratively) many times and/or very intensely.
4. (idiomatic, intransitive) To appear suddenly or inexplicably in large numbers.