/ Dictionary / Index B buy-in: Meaning and Definition of Find definitions for: buy-in Pronunciation: (bī'in"), [key] — n. an act or instance of buying in. the deliberate submission of a false bid, too low to be met, in order to win a contract. the chips purchased by a player from the banker, occasionally a set amount required to enter a specific competition or game. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: buy-in (Thesaurus) buyers' strike buying power 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