/ Dictionary / Index B brain trust: Meaning and Definition of Find definitions for: brain' trust" Pronunciation: [key] a group of experts from various fields who serve as unofficial consultants on matters of policy and strategy. brain-trust Pronunciation: (brān'trust"), [key] — v.t. to serve as a brain trust or a brain truster for: They have brain-trusted many major corporations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Braintree brain truster 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