Definitions for "Resident alien"
A person that is registered to live and work permanently in the U.S. but who is not a U.S. citizen.
An individual who is a lawful, permanent resident of the United States at any time during the calendar year who is not a citizen but is taxed on income following the same rules as a US citizen.
A resident alien is a lawful permanent resident of the United States at any time if he or she has been given the privilege, according to the immigration laws, of residing permanently as an immigrant. This status usually exists if the Bureau of Citizenship and Immigration Services has issued a green card.
a "person" within the meaning of the due process and equal protection of the Fourteenth Amendment