overpopulation
noun/ˌəʊvəˌpɒpjuˈleɪʃn/
/ˌəʊvərˌpɑːpjuˈleɪʃn/
[uncountable]- the fact of a country or city having too many people living in it
- the problems of overpopulation
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overpopulation
Definition of overpopulation noun from the Oxford Advanced Learner's Dictionary