1 One who is not a citizen, national, or subject of a particular country. 2One who is not a citizen, national, or subject of the country in which he resides. 3 One who is born in or owes his allegiance to a foreign country. deportable alien. An alien who may be deported because she was an inadmissible alien when she entered the United States or has violated the regulations (for example, by committing a serious crime) governing the conduct of aliens who are within the country. illegal alien. 1...