/ Dictionary / Index S summation method: Meaning and Definition of Find definitions for: summa'tion meth"od Pronunciation: [key] — Math. Math. a method for associating a sum with a divergent series. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. summation summative Related Content Daily Word Quiz: cetacean Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language