Last modified on 7 July 2014, at 19:39




From French propriétaire, from Latin proprietarius. Compare with the Latin proprietas (property), and proprius (ownership).


  • (US) IPA(key): /prəˈprɑɪ.ə.teɪɹ.i/
  • (file)


proprietary (comparative more proprietary, superlative most proprietary)

  1. Of or relating to property or ownership, as proprietary rights.
  2. Of or relating to the quality of being an owner, as the proprietary class.
  3. Manufactured exclusively by the owner of intellectual property rights, as with a patent or trade secret.
    The continuous profitability of the company is based on its many proprietary products.
  4. Privately owned, as a proprietary lake.
  5. (of a person) Possessive, jealous, or territorial.


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proprietary (plural proprietaries)

  1. A proprietor or owner.
    (Can we find and add a quotation of Fuller to this entry?)
  2. A body of proprietors, taken collectively.
  3. A monk who had reserved goods and belongings to himself, notwithstanding his renunciation of all at the time of profession.