/ Dictionary / Index R rainwater: Meaning and Definition of Find definitions for: rain•wa•ter Pronunciation: (rān'wô"tur, -wot"ur), [key] water fallen as rain. Rain•wa•ter Pronunciation: (rān'wô"tur, -wot"ur), [key] 1917–86, U.S. physicist: Nobel prize 1975. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: rainwater (Thesaurus) rainwash rainwear Related Content Daily Word Quiz: penury Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language