/ Dictionary / Index S summing-up: Meaning and Definition of Find definitions for: sum•ming-up Pronunciation: (sum'ing-up'), [key] — pl. sum•mings-up. a summation or statement made for the purpose of reviewing the basic concepts or principles of an argument, story, explanation, testimony, or the like, and usually presented at the end. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: summing-up (Thesaurus) summery summit Related Content Daily Word Quiz: paradox Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language