from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Considered contrary to the institutions or principles of the United States.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Contrary to the principles or institutions of United States.
- adj. Not good for interest of United States.
- adj. unpatriotic; non-xenophobic.
- adj. incivil, immoral.
un- + American (Wiktionary)