/ Dictionary / Index N necessitate: Meaning and Definition of Find definitions for: ne•ces•si•tate Pronunciation: (nu-ses'i-tāt"), [key] — -tat•ed, -tat•ing. to make necessary or unavoidable: The breakdown of the car necessitated a change in our plans. to compel, oblige, or force: The new wage demand will necessitate a price increase. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: necessitate (Thesaurus) necessitarianism necessitous Related Content Daily Word Quiz: vertigo Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language