/ Dictionary / Index R rain frog: Meaning and Definition of Find definitions for: rain' frog" Pronunciation: [key] — Chiefly Southern U.S. Chiefly Southern U.S. a tree frog, esp. a spring peeper. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. rain forest rain gauge 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