Noun

• S: (n) migration (the movement of persons from one country or locality to another)
• S: (n) migration (a group of people migrating together (especially in some given time period))
• S: (n) migration ((chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule)
• S: (n) migration (the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding)