Definition of aliening:
(n) :
A citizen or national of another sovereign state.
(adj) :
Not belonging to the same country, land, or government, or to the citizens or subjects thereof; foreign.
(n) :
A person, animal, plant, or other thing which is from outside the family, group, organization, or territory under consideration.
(n) :
Any life form of extraterrestrial or extradimensional origin.
(n) :
One excluded from certain privileges; one alienated or estranged.
(adj) :
Very unfamiliar, strange, or removed.