A non-native person who comes to a country from another country to permanently settle there.
A plant or animal that establishes itself in an area where it previously did not exist.
Of or relating to immigrants or the act of immigrating.
One who usually wanders from place to place, having no fixed dwelling, or not abiding in it, and usually without the means of honest livelihood.
A person on a trip of indeterminate destination and/or length of time.
To roam, as a vagabond
Floating about without any certain direction; driven to and fro.