prəˈpraɪətərɪ adj. 1 a
of,
holding, or
concerning property (the proprietary classes). b of or relating to a
proprietor (proprietary rights). 2
held in
private ownership. øproprietary
medicine any of
several drugs, medicines, etc. produced by private companies
under brand names. proprietary
name (or term) a name of a
product etc. registered by
its owner as a
trade mark
and not usable by
another without permission. [LL proprietarius (as PROPERTY)]