Americanism Syllabification: (A·mer·i·can·ism)Pronunciation: /əˈmerikəˌnizəm/Translate Americanism | into German | into Italian Definition of Americanism noun a word or phrase peculiar to or originating in the US. the qualities regarded as definitive of America or Americans:the same Americanism that Whitman sees in the farmerAmericanism in other Oxford dictionaries Definition of Americanism in the British & World English dictionary