proprietorship proprietorially • proprietory · · · Info · Definitions · Synonyms · Characters · · proprietorship · · Text Latin · · Script 14 · · Length Definitions · · · (noun) an unincorporated business owned by a single person who is responsible for its liabilities and entitled to its profits. Synonyms: proprietary. · · Noun Definition 1 Synonyms · · · proprietary · · Synonym 1 Characters · · e latin small letter e U+0065 h latin small letter h U+0068 i latin small letter i U+0069 o latin small letter o U+006F p latin small letter p U+0070 r latin small letter r U+0072 s latin small letter s U+0073 t latin small letter t U+0074