Meaning of Americanism in English:

noun

• 1A word, expression, or other feature that is characteristic of American English.

  ‘the term is an Americanism dating back to the late nineteenth century’

  1. 1.1A custom, quality, or institution characteristic of the United States.
     ‘Americanisms such as the barbecue and the swimming pool’

• 2mass noun Attachment or allegiance to the traditions, institutions, and ideals of the United States.

  ‘Americans in Europe have almost all preserved their Americanism’