/ Dictionary / Index M mounter: Meaning and Definition of Find definitions for: mount•er Pronunciation: (moun'tur), [key] — n. a person or thing that mounts. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mounter (Thesaurus) mounted Mount Everest Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language