Meaning of RAINFALL in English
/rayn"fawl'/ , n.
1. a fall or shower of rain.
2. the amount of water falling in rain, snow, etc., within a given time and area, usually expressed as a hypothetical depth of coverage: a rainfall of 70 inches a year.
[ 1840-50; RAIN + FALL ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012