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Migration
01
(in fish or birds) the act of moving to other regions with different climates according to each season
02
the act of moving to another place or country
03
(chemistry) the nonrandom movement of an atom or radical from one place to another within a molecule
04
a group of people migrating together (especially in some given time period)
Example
Migration patterns have changed the ethnic composition of population groups over decades.
During migration, whales often school in groups.
The villagers took the unexpected migration of birds as an augury of an impending natural disaster.
The upstream migration of salmon is an annual natural phenomenon.
The population of the city experienced exponential growth due to migration and urbanization.