/ Dictionary / Index A arithmetic: Meaning and Definition of Find definitions for: a•rith•me•tic Pronunciation: (n.u-rith'mu-tikadj.ar&secith-met'ik), [key] — n. the method or process of computation with figures: the most elementary branch of mathematics. Also calledthe theory of numbers; the study of the divisibility of whole numbers, the remainders after division, etc. a book on this subject. —adj. of or pertaining to arithmetic. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: arithmetic (Thesaurus) arithmancy arithmetician Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language