/ Dictionary / Index M mentation: Meaning and Definition of Find definitions for: men•ta•tion Pronunciation: (men-tā'shun), [key] — n. mental activity. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mentation (Thesaurus) mental telepathy mentee Related Content Daily Word Quiz: panacea Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language