population-n; 5 Senses

Sense Number 1: number of humans

Commentary: the number of inhabitants (either the total number or the number of a particular race or class) in a given place (country or city etc.)

People come and go, but the population of this town stays the same.
The African-American population of Salt Lake City has been increasing.

WordNet 2.0 Sense Numbers: 4

Sense Number 2: the people

Commentary: the people who inhabit a territory or state

The population seemed to be well fed and clothed.
The population of Neverland voted unanimously for the elimination of Captain Hook.

WordNet 2.0 Sense Numbers: 1

Sense Number 3: number of organisms

Commentary: a group of organisms of the same species populating a given area

They hired hunters to keep down the deer population.
The coyote population has been growing exponentially in the past few years.

WordNet 2.0 Sense Numbers: 2

Sense Number 4: act of populating

Commentary: POPULATION[+event] the act of populating (causing to live in a place)

He deplored the population of colonies with convicted criminals.
The population of the ant farm took George almost six weeks.

WordNet 2.0 Sense Numbers: 5

Sense Number 5: item collection

Commentary: the entire aggregation of items from which samples can be drawn (statistics)

It is an estimate of the mean of the population.

WordNet 2.0 Sense Numbers: 3