noun

• A large extent or tract of land; for example a region, country or district.
• (Canada) One of three of Canada's federal entities, located in the country's Arctic, with fewer powers than a province and created by an act of Parliament rather than by the Constitution: Yukon, Northwest Territories, and Nunavut.
• (Australia) One of three of Australia's federal entities, located in the country's north and southeast, with fewer powers than a state and created by an act of Parliament rather than by the Constitution: Northern Territory, Australian Capital Territory and Jervis Bay Territory.
• A geographic area under control of a single governing entity such as state or municipality; an area whose borders are determined by the scope of political power rather than solely by natural features such as rivers and ridges.
• (ecology) An area that an animal of a particular species consistently defends against its conspecifics.
• (sports and games) The part of the playing field or board over which a player or team has control.
• A geographic area that a person or organization is responsible for in the course of work.
• A location or logical space which someone owns or controls.
• A market segment or scope of professional practice over which an organization or type of practitioner has exclusive rights.
• An area of subject matter, knowledge, or experience.