/ Dictionary / Index C composer: Meaning and Definition of Find definitions for: com•pos•er Pronunciation: (kum-pō'zur), [key] — n. a person or thing that composes. a person who writes music. an author. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: composer (Thesaurus) composed composing room Related Content Daily Word Quiz: arid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language