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English definition of “demography”

demography

noun [U] uk   /dɪˈmɒɡ.rə.fi/ us    /-ˈmɑː.ɡrə-/
the study of changes in the number of births, marriages, deaths, etc. in a particular area during a period of time: historical demography The demography of an area is the number and characteristics of the people who live in an area, in relation to their age, sex, if they are married or not, etc.: The increase in the number of young people leaving to work in the cities has had a dramatic impact on the demography of the villages.
demographic
adjective uk   /ˌdem.əˈɡræf.ɪk/ us  
There have been monumental social and demographic changes in the country. Current demographic trends suggest that there will be fewer school leavers coming into the workforce in ten years' time.
(Definition of demography from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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