'Territoriality' definitions:

Definition of 'territoriality'

From: WordNet
noun
The behavior of a male animal that defines and defends its territory

Definition of 'Territoriality'

From: GCIDE
  • Territoriality \Ter`ri*to`ri*al"i*ty\ n. (Zool.) a pattern of behavior characterized by the marking and defense of a home territory, exhibited by certain male animals. [WordNet 1.5 +PJC]