A plant or animal that establishes itself in an area where it previously did not exist.
A non-native person who comes to a country from another country to permanently settle there.
Of or relating to immigrants or the act of immigrating.
Being a parvenu; also, like, having the characteristics of, or associated with a parvenu.
A person who has risen, climbed up, or has been promoted to a higher social class, especially through acquisition of wealth, privileges, or political authority but has not gained social acceptance by those within that new class.