Meaning of “population” in the English Dictionary

"population" in British English

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populationnoun [ C, + sing/pl verb ]

uk /ˌpɒp.jəˈleɪ.ʃən/ us /ˌpɑː.pjəˈleɪ.ʃən/

B1 all the people living in a particular country, area, or place:

Ten percent of the population lived in poverty.
In 1992 the population of Cairo was approximately 6,500,000.
a growing/shrinking population
Throughout the war, there were horrific casualties among the civilian populations of both countries.
The UN is investigating new methods of population control (= limiting the growth of the number of people).
The country is facing a population explosion (= sudden growth in the number of people).

B2 all the people or animals of a particular type or group who live in one country, area, or place:

There's been a nine percent rise in the prison population (= the number of people in prison).
The dolphin population has been decimated by tuna fishing.

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(Definition of “population” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"population" in American English

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populationnoun [ C/U ]

us /ˌpɑp·jəˈleɪ·ʃən/ abbreviation pop.

all the people living in a particular country, area, or place:

[ U ] What is the population of Toronto (= how many people live there)?

biology Population is also used to refer to all the living things of a particular type or group who live in a particular area or environment.

(Definition of “population” from the Cambridge Academic Content Dictionary © Cambridge University Press)

"population" in Business English

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populationnoun

uk /ˌpɒpjəˈleɪʃən/ us

[ S or U ] the number of people living in a particular country, area, or town:

a population of 12,000/175,000/13 million, etc. With a population of 2.1 million, it is the country's 25th largest metropolitan area.
We've seen a slow but steady decline in population over the years.
In these countries there is still rapid population growth.

[ S ] all the people living in a particular country, area, or town:

10% of the population were living in poverty.

[ C, usually singular ] all the people or animals of a particular type or group that live in one country, area, or town:

More than half of the world's working population has no formal employment or social security arrangements.
With the restrictions on hunting, deer populations have begun to grow.

(Definition of “population” from the Cambridge Business English Dictionary © Cambridge University Press)