Definition of companion animal noun from the Oxford Advanced Learner's Dictionary

 

companion animal

 noun
noun
BrE BrE//kəmˈpæniən ænɪml//
 
; NAmE NAmE//kəmˈpæniən ænɪml//
 
(rather formal)
 
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an animal that you have at home for pleasure, rather than one that is kept for work or food; a pet Companion animals can help reduce stress and offer companionship to lonely people.