/ Dictionary / Index B binary form: Meaning and Definition of Find definitions for: bi'nary form' Pronunciation: [key] a basic musical form having two closely related sections. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. binary fission binary operation 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