migration

noun

1. (countable, uncountable)An instance of moving to live in another place for a while.
2. (countable, uncountable)Seasonal 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.”

3. (countable, uncountable)Movement in general.

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

4. (countable, uncountable)Instance of changing a platform from an environment to another one.
5. (countable, uncountable)The movement of cells in particular directions to specific locations.