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Dictionary definition for: Migration

1. (n) the movement of persons from one country or locality to another

2. (n) a group of people migrating together (especially in some given time period)

3. (n) (chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule

4. (n) the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding

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