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Syllabification: pro·pri·e·tar·y
Pronunciation: /p(r)əˈprīəˌterē

Definition of proprietary in English:


1Of or relating to an owner or ownership: the company has a proprietary right to the property
More example sentences
  • So far as one knows, there is no ownership or proprietary rights over flowing waters.
  • The common law tradition posed fewer difficulties for the Crown as long as its vocabulary was informed by ideas of feudal tenure rather than proprietary ownership.
  • That sense of ownership sometimes includes a proprietary attitude toward waterways abutting a Texan's land.
1.1(Of a product) marketed under and protected by a registered trade name: proprietary brands of insecticide
More example sentences
  • Those catalysts could include new products, demographic trends, proprietary products, increased market share, or a change in cost structure.
  • I expect this will only continue to get worse as more and more companies attempt to ‘protect’ their proprietary products and services.
  • There's a high premium on proprietary product.
copyrighted, trademarked, owned, private, registered, patented, exclusive
1.2Behaving as if one were the owner of someone or something: he looked about him with a proprietary air
More example sentences
  • ‘They don't have anything like bouncy castles here,’ says Louise, striding with a proprietary air through the long grass of what one day soon will be their own mini theme park.
  • As a senior member of the men's group that wandered in and out of the café all day, he nursed a kind of proprietary air about the place.
  • She nurses a proprietary air about the place and has a particular fetish about the driveway.


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1.1 historical Especially in North America, a grantee or owner of a colony who has been granted, as an individual or as part of a group, the full rights of self-government.


late Middle English (as a noun denoting a member of a religious order who held property): from late Latin proprietarius 'proprietor', from proprietas (see property).

Definition of proprietary in:

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