/ Dictionary / Index M manifest function: Meaning and Definition of Find definitions for: man'ifest func'tion Pronunciation: [key] any function of an institution or other social phenomenon that is planned and intentional. Cf. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Manifest Destiny manifesto Related Content Daily Word Quiz: perspicacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language