adjective
- opposed or hostile to the United States of America, its people, its principles, or its policies.
noun
- an anti-American person.
adjective
- opposed to anything of or relating to the United States of America
also antiamerican, 1788 (n.), in reference to British parliamentary policies, from anti- + American. As an adjective by 1838. Related: Anti-Americanism “opposition to what is distinctly American,” 1844.