These words refer to the movement of people or animals from one place to another. Migrate suggests the movement of a large group: the Teutonic tribes that migrated to Britain; Tasmanian mutton birds that migrate as far north as Alaska in winter. Emigrate and immigrate refer to permanent movements, mainly of people, whether singly or in small or large groups. Emi grate involves movement from a place; immigrate movement to a place.

• European families emigrating from their homelands in the aftermath of World War II were encouraged to immigrate to Australia.

Move has a special sense of leaving one residence for another: people moving from the city to the suburbs. Apart from this specific use, it is the most general word here, suggesting any change of location under any circumstances: moving rapidly through the crowd in search of the lost child. Travel has a special sense of taking a relatively brief trip to a place where one does not live, without necessarily intending to stay there: travelling to Europe on a cargo vessel; travelling from one port to another in search of excitement. In more general senses, it emphasizes the mere act of getting somewhere: travelling to work by bus or train.