Proprietary

Part of speech: noun (n.)

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. Fuller.

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.

Part of speech: adjective (a.)

Belonging, or pertaining, to a proprietor; considered as property; owned; as, proprietary medicine. Proprietary articles, manufactured articles which some person or persons have exclusive right to make and sell. U. S. Statutes.