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 amongst 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).Environmental issuesRubbish and wasteProtection and protectors 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.Environmental issuesRubbish and wasteProtection and protectors