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English Lexicon

Proprietary

/prəˈpraɪ.ə.tər.i/
adjectivenounCEFR C1 (Advanced)Top #4500 frequency
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Comprehensive Definitions & Senses

2 senses
As adjective
  1. 1

    Relating to an owner or ownership.

    "The proprietary software is only available for purchase and cannot be modified."
As noun
  1. 1

    A person who owns something, especially a business.

    "The proprietor of the café was known for his exceptional customer service."
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Thesaurus & Semantic Spectrum

Antonyms & Contrasting Words (1)

Linguistic Origin & Historical Etymology

Derived from the Latin 'proprietas' meaning property or ownership, entering English in the 15th century via Medieval Latin 'proprietarius'. Over time, it evolved from signifying legal ownership of property to describing commercially protected products, processes, or software exclusive to a specific creator.

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