/ Dictionary / Index M mind-altering: Meaning and Definition of Find definitions for: mind-al•ter•ing Pronunciation: (mīnd'ôl"tur-ing), [key] — adj. causing marked changes in patterns of mood and behavior, as a hallucinogenic drug. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mind-altering (Thesaurus) mind Mindanao 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