from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Relating to, used by, or involving both eyes at the same time: binocular vision.
  • adj. Having two eyes arranged to produce stereoscopic vision.
  • n. An optical device, such as a pair of field glasses or opera glasses, designed for simultaneous use by both eyes and consisting of two small telescopes joined with a single focusing device. Often used in the plural.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Using two eyes or viewpoints; especially, using two eyes or viewpoints to ascertain distance.
  • n. attributive form of binoculars
  • n. A pair of binoculars.
  • n. Any binocular glass, such as an opera glass, telescope, or microscope.

from the GNU version of the Collaborative International Dictionary of English

  • adj. Having two eyes.
  • adj. Pertaining to both eyes; employing both eyes at once.
  • adj. Adapted to the use of both eyes.
  • n. A binocular glass, whether opera glass, telescope, or microscope.

from The Century Dictionary and Cyclopedia

  • Having two eyes: as, “most animals are binocular,” Also binoculate.
  • Referring to both eyes; suited for the simultaneous use of both eyes: as, a binocular telescope or microscope.
  • n. An optical instrument, such as a field-glass, with two objectives and two eyepieces, adjusted so as to permit the simultaneous use of both eyes. The word binocular has almost entirely supplanted the older and grammatically preferable form binocle.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. relating to both eyes


Sorry, no etymologies found.


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