All 4 Uses

immigrate
in
The Bean Trees
(Auto-generated)

Then the TV showed both Mattie and the interview man talking without sound, and another man's voice told us that the Immigration and Naturalization Service had returned two illegal aliens, a woman and her son, to their native El Salvador last week, and that Mattie "claimed" they had been taken into custody when they stepped off the plane in San Salvador and later were found dead in a ditch.†
Chpt 7.

immigration = the act of coming to live in a new country; or indication that something is related to that act
Immigration is making noises.†
Chpt 11. *
FOURTEEN Guardian Saints We were stopped by Immigration about a hundred miles this side of the New Mexico border.†
Chpt 14.
I had asked them please not to wear their very best for this occasion, not their Immigration-fooling clothes.†
Chpt 16.

Definitions:

(1) (immigrate)
come to live in a new country
(2) (meaning too rare to warrant focus)
Much more rarely, immigrate can mean that anything (such as an animal or plant) migrates into a new environment.