/ Dictionary / Index C codeine: Meaning and Definition of Find definitions for: co•deine Pronunciation: (kō'dēn), [key] — n. Pharm. a white, crystalline, slightly bitter alkaloid, CHNO, obtained from opium, used in medicine chiefly as an analgesic or sedative and to inhibit coughing. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: codeine (Thesaurus) code flag code name Related Content Daily Word Quiz: resilient Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language