to go from one country, region, or place to another.

to pass periodically from one region or climate to another, as certain birds, fishes, and animals

The birds migrate southward in the winter.

to shift, as from one system, mode of operation, or enterprise to another.

Physiology . (of a cell, tissue, etc.) to move from one region of the body to another, as in embryonic development.

Chemistry .

(of ions) to move toward an electrode during electrolysis.

(of atoms within a molecule) to change position.

(at British universities) to change or transfer from one college to another.