migration

What it means

1. countableuncountableAn instance of moving to live in another place for a while.
2. countableuncountableSeasonal 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.

   2013 January 1, Paul Bartel, Ashli Moore, “Avian Migration: The Ultimate Red-Eye Flight”, in American Scientist, volume 101, number 1, archived from the original on 05 Mar 2016, pages 47–48

3. countableuncountableMovement in general.

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

In a sentence

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.

2013 January 1, Paul Bartel, Ashli Moore, “Avian Migration: The Ultimate Red-Eye Flight”, in American Scientist, volume 101, number 1, archived from the original on 05 Mar 2016, pages 47–48

Where it comes from

1. Latinmigrātiō
2. Middle Frenchmigration
3. Englishmigration

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