territory

A person's, animal's, or group's territory is land he, she, or they claim, own, or control.

Example: The wolf defended its territory.

Your territory is what belongs to you. This could mean things, power, mates, or even responsibilities.

Example: Don't move into my territory in this office, especially not in sales.

A territory large amount of land, like a country or a state. Often, this means a large piece of land claimed as part of a country.

Example: Porta Rico is a U.S. territory, but not a state.