/ Dictionary / Index A adjoint differential equation: Meaning and Definition of Find definitions for: ad'joint differen'tial equa'tion Pronunciation: [key] — Math. Math. a differential equation obtained from a given differential equation and having the property that any solution of one equation is an integrating factor of the other. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. adjoint adjourn Related Content Daily Word Quiz: reiterate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language