/ Dictionary / Index B binary pulsar: Meaning and Definition of Find definitions for: bi'nary pul'sar Pronunciation: [key] — Astron. Astron. a pulsar in a binary system. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. binary opposition binary star 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