/ Dictionary / Index W waterbrain: Meaning and Definition of Find definitions for: wa•ter•brain Pronunciation: (wô'tur-brān", wot'ur-), [key] — n. Vet. Pathol. gid, in sheep. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. water boy water brash Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language