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| 1. |
migration - the movement of persons from one country or locality to another |
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motion,
move,
movement the act of changing location from one place to another; "police controlled the motion of the crowd"; "the movement of people from the farms to the cities"; "his move put him directly in my path"
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emigration,
expatriation,
out-migration migration from a place (especially migration from your native country in order to settle in another)
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immigration,
in-migration migration into a place (especially migration to a country of which you are not a native in order to settle there)
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gold rush a large migration of people to a newly discovered gold field
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| 2. |
migration - the periodic passage of groups of animals (especially birds or fishes) from one region to another for feeding or breeding |
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periodic event,
recurrent event an event that recurs at intervals
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| 3. |
migration - (chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule |
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event something that happens at a given place and time
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chemical science,
chemistry the science of matter; the branch of the natural sciences dealing with the composition of substances and their properties and reactions
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| 4. |
migration - a group of people migrating together (especially in some given time period) |
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people (plural) any group of human beings (men or women or children) collectively; "old people"; "there were at least 200 people in the audience"
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