Definition of territoriality noun from the Oxford Advanced Learner's Dictionary

 

territoriality

 noun
noun
BrE BrE//ˌterəˌtɔːriˈæləti//
 
; NAmE NAmE//ˌterəˌtɔːriˈæləti//
 
[uncountable]
 
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the desire in animals, birds, etc, to guard and defend an area of land that they believe to be their own the instinctive territoriality of some animals