/ Dictionary / Index B brainteaser: Meaning and Definition of Find definitions for: brain•teas•er Pronunciation: (brān'tē"zur), [key] — n. a puzzle or problem whose solution requires great ingenuity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Brains Trust Braintree Related Content Daily Word Quiz: secular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language