from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The act or an instance of migrating.
  • n. A group migrating together.
  • n. Chemistry & Physics The movement of one atom or more from one position to another within a molecule.
  • n. Chemistry & Physics The movement of ions between electrodes during electrolysis.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. An instance moving a place to live to another place for a while.
  • n. Seasonal moving for animals, birds or fishes to breed or find a new home.
  • n. Instance of changing a platform from an environment to another one.

from the GNU version of the Collaborative International Dictionary of English

  • n. The act of migrating.

from The Century Dictionary and Cyclopedia

  • n. The act of migrating; change of residence or habitat; removal or transit from one locality or latitude to another, especially at a distance.
  • n. A number of animals migrating together; the total of the individuals or species which perform any particular migration; also, the time or period occupied in migrating Change of place; removal.
  • n. Residence in a foreign country; banishment.
  • n. In phytogeography, the movement of plants from one area into another. According to F. E. Clements this is properly a narrower term than invasion. See invasion, 4.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

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


From Middle French migration and its source, Latin migrātiō, from the participle stem of migrō ("I migrate"). (Wiktionary)


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