0 the study of changes in the number of births, marriages, deaths, etc. in a particular area during a period of time: --
1 the study of people in a particular area, to discover how many have particular characteristics and to record changes in the number of males, females, births, marriages, deaths, etc.: --
Demography is the statistical study of human populations.
2 the number and characteristics of people in a particular area, for example, their ages, sex, and whether or not they are married: --