migration

Meanings

1. 1
   noun

   the periodic passage of groups of animals, especially birds or fishes, from one region to another for feeding or breeding

   Migration is integral to the survival of many species.

2. 2
   noun

   Seasonal moving of animals, as mammals, birds or fish, especially between breeding and non-breeding areas.

   Many of these classic methods are still used, with some modern improvements. For example, with the aid of special microphones and automated sound detection software, ornithologists recently reported […] that pine siskins (Spinus pinus) undergo an irregular, nomadic type of nocturnal migration.

3. 3
   noun

   Movement in general.

   The migration of lead from a can to the food inside it can cause lead poisoning.

4. 4
   noun

   the movement of persons from one country or locality to another

5. 5
   noun

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

6. 6
   noun

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

7. 7
   noun

   An instance of moving to live in another place for a while.

8. 8
   noun

   Instance of changing a platform from an environment to another one.

Etymology

From Middle French migration and its source, Latin migrātiō, from the participle stem of migrō (“to migrate”). Morphologically migrate + -ion.