What does nonproprietary mean?
Nonproprietary describes something that is not exclusively owned, controlled, or restricted by a particular person or organization. The term is especially common in technology, science, and law: a nonproprietary standard or format can generally be used without permission from a single commercial owner, whereas a proprietary product remains subject to its owner’s intellectual-property rights or licensing terms. Nonproprietary does not necessarily mean free of charge, and it is not automatically synonymous with open source; the surrounding context determines whether the discussion concerns patents, copyright, source-code access, or simply the absence of exclusive ownership. Its formation from non- and proprietary, ultimately related to proper and property, makes its central meaning accessible: something outside the category of private or exclusive rights. In careful writing, the word is useful when precision matters, because it identifies the absence of proprietary restrictions without making broader claims about price, quality, or licensing.
adjectiveNot proprietary; not exclusively owned or controlled by a particular person or organization. In legal and technical contexts, it may indicate that something is free of patent or copyright restrictions or otherwise available for general use.
- Not restricted to a particular owner; available for general use.
- Not protected by a patent or copyright and therefore free of those forms of exclusive restriction.
"The laboratory adopted nonproprietary standards so that its instruments could work with equipment from other suppliers."
"The researchers adopted a nonproprietary imaging format that could be used by laboratories throughout the world."
"The archival photographs are nonproprietary and may be reproduced without permission."
Nonproprietary means “not locked to one owner” in software, science, and publishing—and that is different from saying it must be free.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does nonproprietary come from?
The adjective was formed in English by adding the negative prefix non- to proprietary. Proprietary derives through Latin from roots meaning “one’s own” or “ownership,” the same source behind proper, property, and propriety. The prefixed form expresses opposition to exclusive proprietary status rather than the absence of every possible restriction.
Related word forms
How nonproprietary is actually used
Formal and technical, especially in law, publishing, science, and technology. It denotes the absence of exclusive proprietary status; it does not by itself imply that an item is free of charge, and it is broader than the term open source.
Easily confused with nonproprietary
Proprietary means exclusively owned or controlled, often through patents, copyrights, trademarks, or licensing, whereas nonproprietary means that such proprietary restrictions do not apply.