un-american
AdjectiveOpen English WordNet
Adjective (1)
- considered contrary to the best interests of the United StatesOpposite loyalSimilar unpatriotic, disloyal
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Webster's Dictionary (1913)
Un-American
Formed with the prefix un- (“not”). See -American.
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54
The Devil's Dictionary
UN-AMERICAN, adj. Wicked, intolerable, heathenish.