/ Dictionary / Index D decorum: Meaning and Definition of Find definitions for: de•co•rum Pronunciation: (di-kôr'um, -kōr'-), [key] — n. dignified propriety of behavior, speech, dress, etc. the quality or state of being decorous; orderliness; regularity. Usually,an observance or requirement of polite society. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: decorum (Thesaurus) decortication decoupage Related Content Daily Word Quiz: reclusive Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language