/ ˌterəˈtɔːriəl; NAmE / adjective
1.
connected with the land or sea that is owned by a particular country :
territorial disputes
Both countries feel they have territorial claims to (= have a right to own) the islands.
2.
( of animals, birds, etc. ) guarding and defending an area of land that they believe to be their own :
territorial instincts
Cats are very territorial.
► ter·ri·tori·al·ity / ˌterəˌtɔːriˈæləti; NAmE / noun [ U ]:
the instinctive territoriality of some animals
► ter·ri·tori·al·ly adverb :
The country was trying to expand territorially.
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WORD ORIGIN
early 17th cent.: from late Latin territorialis , from Latin territorium , from terra land.