- the process or act of migrating.
- a migratory movement: preparations for the migration.
- a number or body of persons or animals migrating together.
- a movement or change of position of atoms within a molecule.
- diffusion (def. 3a).
- the act or an instance of migrating
- a group of people, birds, etc, migrating in a body
- a movement of atoms, ions, or molecules, such as the motion of ions in solution under the influence of electric fields
