Relier Pairs Measuring populationsVersion en ligne Now you have to relate the terms with its definition. par Laura Jiménez Ruiz 1 Actual increase 2 Natural increase 3 Population density 4 Emigrant 5 Immigrant 6 Absolute population The total number of people living in an area. The average number of people who live in each square kilometre of land. A person who moves away from an area. A person who moves into an area. The difference between the number of births and the number of deaths. Includes the natural increase, the immigrants arriving and emigrants leaving.