/ Dictionary / Index M mutual fund: Meaning and Definition of Find definitions for: mu'tual fund" Pronunciation: [key] an investment company that issues shares continuously and is obligated to repurchase them from shareholders on demand. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. Mutual Assured Destruction mutual impedance Related Content Daily Word Quiz: abominable Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language