The Collaborative International Dictionary of English v.0.48:

Territory \Ter"ri*to*ry\, n.; pl. Territories. [L.
   territorium, from terra the earth: cf. F. territoire. See
   Terrace.]
   1. A large extent or tract of land; a region; a country; a
      district.
      [1913 Webster]

            He looked, and saw wide territory spread
            Before him -- towns, and rural works between.
                                                  --Milton.
      [1913 Webster]

   2. The extent of land belonging to, or under the dominion of,
      a prince, state, or other form of government; often, a
      tract of land lying at a distance from the parent country
      or from the seat of government; as, the territory of a
      State; the territories of the East India Company.
      [1913 Webster]

   3. In the United States, a portion of the country not
      included within the limits of any State, and not yet
      admitted as a State into the Union, but organized with a
      separate legislature, under a Territorial governor and
      other officers appointed by the President and Senate of
      the United States. In Canada, a similarly organized
      portion of the country not yet formed into a Province.
      [1913 Webster]

WordNet (r) 3.0 (2006):

territory
    n 1: a region marked off for administrative or other purposes
         [syn: district, territory, territorial dominion,
         dominion]
    2: an area of knowledge or interest; "his questions covered a
       lot of territory"
    3: the geographical area under the jurisdiction of a sovereign
       state; "American troops were stationed on Japanese soil"
       [syn: territory, soil]