/ Dictionary / Index M mentalist: Meaning and Definition of Find definitions for: men•tal•ist Pronunciation: (men'tl-ist), [key] — n. a person who believes in or advocates mentalism. a person who believes that the mind and its functions are a legitimate area of psychological research. a mind reader, psychic, or fortuneteller. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. mentalism mentality Related Content Daily Word Quiz: placid Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language