Definition of Feme sole trader
In old English law, a married woman, who, by the custom of London, trades on her own account, independently of her husband; so called because, with respect to her trading, she is the same as a feme sole. The term is applied also to women deserted by their husbands, who do business as femes sole.
That's the definition of Feme sole trader in Black's Law Dictionary 6th Edition. Courtesy of Cekhukum.com.