territorial
US /ˌter.əˈtɔːr.i.əl/
UK /ˌter.əˈtɔːr.i.əl/
1.
relating to the ownership of an area of land or sea
:
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The dispute is over territorial waters.
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They are discussing territorial claims.
2.
of or relating to the defense of an area by a country's armed forces
:
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The army is responsible for territorial defense.
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They joined the Territorial Army.
3.
of an animal or person, tending to defend an area of land or sea against intruders
:
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Dogs can be very territorial about their homes.
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He's very territorial about his workspace.