rainfall Meaning, Definition & Usage

  1. noun water falling in drops from vapor condensed in the atmosphere
    rain.

WordNet

Rain"fall` noun
Definitions
  1. A fall or descent of rain; the water, or amount of water, that falls in rain; as, the average annual rainfall of a region.
    Supplied by the rainfall of the outer ranges of Sinchul and Singaleleh. Hooker.

Webster 1913