Origin: Greek suffix -ism
Americanism has 4 different meanings across 1 category:
loyalty to the United States and its institutions
an expression that is characteristic of English as spoken by Americans
a custom that is peculiar to the United States or its citizens
A custom peculiar to the United States or the Americans.
Americanism comes from combining the word American with the suffix -ism. It originally meant a characteristic or practice specific to America.