migration /maɪˈɡɹeɪʃ(ə)n/ noun5 •An instance of moving to live in another place for a while. •Seasonal moving of animals, as mammals, birds or fish, especially between breeding and non-breeding areas. •Movement in general.The migration of lead from a can to the food inside it can cause lead poisoning. •The movement of cells in particular directions to specific locations. •Instance of changing a platform from an environment to another one. formsmigrations