population UK /ˌpɒp.jʊˈleɪ.ʃən/US /ˌpɑ.pjəˈleɪ.ʃən/ noun8 •The people living within a political or geographical boundary.The population of New Jersey will not stand for this! •The people with a given characteristic.India has the third-largest population of English-speakers in the world. •A collection of organisms of a particular species, sharing a particular characteristic of interest, most often that of living in a given area.A seasonal migration annually changes the populations in two or more biotopes drastically, many twice in opposite senses. •the figure that tells how many people make their homes inside the borders of a placeThe town’s population is only 243. •A group of units (persons, objects, or other items) enumerated in a census or from which a sample is drawn.[…]it is possible it [the Anglo-Saxon race] might stand second to the Scandinavian countries [in average height] if a fair sample of their population were obtained. — 1883 •The act of filling initially empty items in a collection.John clicked the Search button and waited for the population of the list to complete. •General population.I would like to say something about the place I am doing time at. When I was placed in population, I met another woman and we immediately became good friends. — 1985 •The number of living cells in a pattern.This is one of several known "sawtooth" patterns, in which the population is unbounded but does not tend to infinity. — 1996 formspopulations