/ Dictionary / Index M mind-expanding: Meaning and Definition of Find definitions for: mind-ex•pand•ing Pronunciation: (mīnd'ik-span"ding), [key] — adj. heightening perceptions in a hallucinatory way: mind-expanding drugs. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: mind-expanding (Thesaurus) minder mindful Related Content Daily Word Quiz: philtrum Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language