/ Dictionary / Index M monocle: Meaning and Definition of Find definitions for: mon•o•cle Pronunciation: (mon'u-kul), [key] — n. an eyeglass for one eye. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: monocle (Thesaurus) monochrome monoclinal Related Content Daily Word Quiz: cautious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language