necessitarian Syllabification: (ne·ces·si·tar·i·an)Pronunciation: /nəˌsesəˈte(ə)rēən/Definition of necessitarian noun & adjective Philosophy another term for determinist (see determinism).Derivatives necessitarianismPronunciation: /-ˌnizəm/ noun necessitarian in other Oxford dictionaries Definition of necessitarian in the British & World English dictionary