/ Dictionary / Index R rainfall: Meaning and Definition of Find definitions for: rain•fall Pronunciation: (rān'fôl"), [key] — n. a fall or shower of rain. 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. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rainfall (Thesaurus) Rainey rain forest Related Content Daily Word Quiz: censure Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language