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

  • n. An eyeglass for one eye.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. a single lens, usually in a wire frame, and used to correct vision for only one eye

from the GNU version of the Collaborative International Dictionary of English

  • n. An eyeglass for one eye.

from The Century Dictionary and Cyclopedia

  • n. A monoculous or one-eyed animal; a monocule.
  • n. A glass for one eye; a single eye-glass.
  • n. In photography, an uncorrected spectacle-lens, usually periscopic, of about 1½ inches diameter, and of a focus of 2 inches and upward.

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

  • n. lens for correcting defective vision in one eye; held in place by facial muscles


French, from Late Latin monoculus, having one eye : Greek mono-, mono- + Latin oculus, eye; see okw- in Indo-European roots.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From French monocle, from Late Latin monoculus ("one-eyed"), from mono- ("single") + oculus ("eye"). (Wiktionary)



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  • ... my monocle bent towards asphalt

    Andrew Lundwall, on the communal As/Is

    December 21, 2006