Proprietary Definition
A proprietor or owner.
Other Word Forms of Proprietary
Noun
Origin of Proprietary
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From Middle English proprietarie owner of property from Old French proprietaire and from Medieval Latin proprietārius both from Late Latin of a property owner from Latin proprietās ownership property
From American Heritage Dictionary of the English Language, 5th Edition
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From French propriétaire, from Latin proprietarius. Compare with the Latin proprietas (“property"), and proprius (“ownership").
From Wiktionary
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