/ Dictionary / Index M misuser: Meaning and Definition of Find definitions for: mis•us•er Pronunciation: (mis-y'zur), [key] — n. Law. abuse of a right; unlawful use of an office, franchise, benefit, etc. mis•us•er Pronunciation: (mis-y'zur), [key] — n. a person who misuses. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. misuse misventure Related Content Daily Word Quiz: belligerent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language