Definition of proprietorial adjective from the Oxford Advanced Learner's Dictionary

 

proprietorial

 adjective
adjective
BrE BrE//prəˌpraɪəˈtɔːriəl//
 
; NAmE NAmE//prəˌpraɪəˈtɔːriəl//
 
(formal)
 
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relating to an owner or to the fact of owning something proprietorial rights He laid a proprietorial hand on her arm (= as if he owned her).
See the Oxford Advanced American Dictionary entry: proprietorial