/ Dictionary / Index D demeanor: Meaning and Definition of Find definitions for: de•mean•or Pronunciation: (di-mē'nur), [key] — n. conduct; behavior; deportment. facial appearance; mien. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: demeanor (Thesaurus) demeaning demeclocycline Related Content Daily Word Quiz: digression Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language