/ Dictionary / Index M metonym: Meaning and Definition of Find definitions for: met•o•nym Pronunciation: (met'u-nim), [key] — n. a word used in metonymy. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: metonym (Thesaurus) Metonic cycle metonymical Related Content Daily Word Quiz: sequester Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language