different in nature or character
a foreigner who has not become a citizen of the country where he or she is living
being from another world
"an economic theory alien to the spirit of capitalism"
"the mysticism so foreign to the French mind and temper"
"jealousy is foreign to her nature"
"exotic plants in a greenhouse"
"The will aliened the property to the heirs"
"She alienated her friends when she became fanatically religious"
The sad heart of Ruth, when, sick for home, She stood in tears amid the alien corn.
Was this an alien attempt to establish life on this planet?