/ Dictionary / Index B binocular: Meaning and Definition of Find definitions for: bin•oc•u•lar Pronunciation: (bu-nok'yu-lur, bī-), [key] — n. Usually,Also calledan optical device, providing good depth effect, for use with both eyes, consisting of two small telescopes fitted together side by side, each telescope having two prisms between the eyepiece and objective for erecting the image. —adj. involving both eyes: binocular vision. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: binocular (Thesaurus) binocle binocular fusion 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