associationism Syllabification: (as·so·ci·a·tion·ism)Pronunciation: /əˌsōsēˈāSHəˌnizəm, -ˌsōSHē-/Definition of associationism noun a theory in philosophy or psychology that regards the simple association or co-occurrence of ideas or sensations as the primary basis of meaning, thought, or learning. Derivatives associationist noun & adjective associationism in other Oxford dictionaries Definition of associationism in the British & World English dictionary