proprietary
/prəˈprajəˌteri/
Brit
/prəˈprajətri/
adjective
/prəˈprajəˌteri/
Brit
/prəˈprajətri/
adjective
Britannica Dictionary definition of PROPRIETARY
formal
1
:
of or like that of an owner
2
:
used, made, or sold only by the particular person or company that has the legal right to do so
3
:
kept private by an owner