Webster's English Dictionary

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proprietor

pro.pri.etor \p(r)*-'pri--*t-*r\ \-.ship\ \-'pri--*-tres\ n [alter. of 
   1proprietary)] 1: PROPRIETARY  2a: one who has the legal right or exclusive 
   title to something : OWNE R 2b: one having an interest less than absolute 
   and exclusive right  - pro.pri.etor.ship n