Americanism Look up Americanism at Dictionary.com
1781, in ref. to words or phrases distinct from British use, coined by John Witherspoon (1723–1794), president of Princeton College, from adj. form of America (q.v.) + -ism. (American English "English language as spoken in the United States" is first recorded 1806, in Webster.) Americanism in the patriotic sense "attachment to the U.S." is attested from 1797, first found in the writings of Thomas Jefferson.