Proprietary /(?)/

pl. Proprietaries

1. A proprietor or owner; one who has exclusive title to a thing; one who possesses, or holds the title to, a thing in his own right.
2. A body proprietors, taken collectively.
3. A monk who had reserved goods and effects to himself, notwithstanding his renunciation of all at the time of profession. (Eccl.)

1. Belonging, or pertaining, to a proprietor; considered as property; owned; as, proprietary medicine.