/ Dictionary / Index B bit key: Meaning and Definition of Find definitions for: bit' key" Pronunciation: [key] a key having a wing bit for moving a leverlike tumbler of a lock. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. biting midge bit map 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