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English definition of “proprietary”

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proprietary

adjective [before noun] uk   /prəˈpraɪə.tər.i/ us    /-ter.i/
relating to owning something, or relating to or like an owner: I just assumed he owned the place - he had a proprietary air about him. Proprietary goods are made and sent out by a particular company whose name is on the product: proprietary medicines
(Definition of proprietary from the Cambridge Advanced Learners Dictionary & Thesaurus © Cambridge University Press)
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