noun
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the act or an instance of migrating
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a group of people, birds, etc, migrating in a body
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chem a movement of atoms, ions, or molecules, such as the motion of ions in solution under the influence of electric fields
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The seasonal movement of a complete population of animals from one area to another. Migration is usually a response to changes in temperature, food supply, or the amount of daylight, and is often undertaken for the purpose of breeding. Mammals, insects, fish, and birds all migrate. The precise mechanism of navigation during migration is not fully understood, although for birds it is believed that sharp eyesight, sensibility to the Earth's magnetic field, and the positions of the Sun and other stars may play a role.
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The movement of one atom or more, or of a double bond, from one position to another within a molecule.
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The movement of ions between electrodes during electrolysis.
Other Word Forms
- migrational adjective
- nonmigration noun
- premigration adjective
- remigration noun
Etymology
Origin of migration
First recorded in 1605–15, migration is from the Latin word migrātīon- (stem of migrātiō ). See migrate, -ion
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
Earlier research proposed that this land bridge stopped functioning as a migration route around 56 million years ago.
From Science Daily
Fish species that undertake mammoth migrations through rivers, lakes and ponds are facing a combined threat from dams, pollution and overfishing preventing them from reaching their breeding grounds.
From BBC
Cuba has an ageing population, a very low birth rate and huge outward migration.
From BBC
Envoys are stepping into some of Europe’s most sensitive debates, accusing governments of failing to counter the far left, migration and antisemitism.
"With the dating of this extremely ancient rock art in Sulawesi, we now have the oldest direct evidence for the presence of modern humans along this northern migration corridor into Sahul," Professor Joannes-Boyau said.
From Science Daily
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
