Definition of companion animal
: a domesticated animal : pet … an amazing tour de force of animal-human relationships, with chapters on our companion animals, as well as on livestock, wildlife, and zoos. — Tim Flannery, The New York Times Book Review, 29 Apr. 2009 These companion animals are being used very specifically as adjuncts in the therapy of disabled people. — Patricia Curtis, Smithsonian, July 1981
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First Known Use of companion animal
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