|Origin:||proprietarius, from Latin proprietas; PROPERTY|
1BBT especially British English
a proprietary product is one that is sold under a trade name [≠ generic]:
a proprietary brand of insecticide
proprietary software products
relating to who owns something:
They have proprietary rights to the data.
He has no proprietary interest in the farm (=he does not own any part of it).
proprietary behaviour makes it seem that you think you own something or someone