proprietary - definition and synonyms

adjective formal 

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/prəˈpraɪət(ə)ri/
  1. 1
    owned by a person or company and sold under a trademark or patent

    proprietary brands/drugs

    1. a.
      relating to owning something

      a proprietary interest/right

  2. 2
    typical of an owner

    a proprietary air/attitude