/ Dictionary / Index B binary system: Meaning and Definition of Find definitions for: bi'nary sys"tem Pronunciation: [key] a system involving only two elements, as 0 and 1 or yes and no. a system of counting or measurement whose units are powers of two. Cf. binary (def. 2a). SeeAlso called Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. binary star binate 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