A group of units (persons, objects, or other items) enumerated in a census or from which a sample is drawn.
A collection of organisms of a particular species, sharing a particular characteristic of interest, most often that of living in a given area.
The act of filling initially empty items in a collection.
The people with a given characteristic.
The people living within a political or geographical boundary.
A count of the number of residents within a political or geographical boundary such as a town, a nation or the world.