rain rain /ˈreɪn/

noun

1. () Water falling in drops from vapor condensed in the atmosphere  ( rainfall , rain )
   water falling in drops from vapor condensed in the atmosphere
    The rain poured down in sheets, making it impossible to see more than a few meters ahead
   The rain poured down in sheets, making it impossible to see more than a few meters ahead
   
   
2. () Drops of fresh water that fall as precipitation from clouds  ( rainwater , rain )
   drops of fresh water that fall as precipitation from clouds
     The rain fell steadily, soaking the ground.
   The rain fell steadily, soaking the ground.
   
   
3. Anything happening rapidly or in quick successive  ( rain , pelting )
   anything happening rapidly or in quick successive
    A rain of bullets
   a rain of bullets
    A pelting of insults
   a pelting of insults
   

verb

1. () Precipitate as rain  ( rain down , rain )
   precipitate as rain
    If it rains much more, we can expect some flooding
   If it rains much more, we can expect some flooding