/ Dictionary / Index N necessitarianism: Meaning and Definition of Find definitions for: ne•ces•si•tar•i•an•ism Pronunciation: (nu-ses"i-târ'ē-u-niz"um), [key] — n. the doctrine that all events, including acts of the will, are determined by antecedent causes; determinism. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. necessitarian necessitate Related Content Daily Word Quiz: soporific Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language