/ Dictionary / Index D definitely: Meaning and Definition of Find definitions for: def•i•nite•ly Pronunciation: (def'u-nit-lē), [key] — adv. in a definite manner; unambiguously. unequivocally; positively. —interj. (used to express complete agreement or strong affirmation): Are you starting your diet tomorrow? Definitely! Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: definitely (Thesaurus) definite integral definite relative clause Related Content Daily Word Quiz: nonchalant Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language