/ Dictionary / Index A assuming: Meaning and Definition of Find definitions for: as•sum•ing Pronunciation: (u-s'ming), [key] — adj. taking too much for granted; presumptuous. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: assuming (Thesaurus) assumed bond assumpsit Related Content Daily Word Quiz: penurious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language