/ Dictionary / Index T theory of equations: Meaning and Definition of Find definitions for: the'ory of equa'tions Pronunciation: [key] — Math. Math. the branch of mathematics dealing with methods of finding the solutions to algebraic equations. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. theory Theory of Everything Related Content Daily Word Quiz: procrastinate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language