demographyPronunciation: /dɪˈmɒgrəfi/Translate demography | into Spanish Definition of demography noun [mass noun] the study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations. the composition of a particular human population:Europe’s demography is changingDerivatives demographer noun Origin: late 19th century: from Greek dēmos 'the people' + -graphydemography in other Oxford dictionaries Definition of demography in the US English dictionary