Mistress
Defined in 3 dictionaries — Cyclopedic (1922), Black's (1910), Black's (1891)
The Cyclopedic Law Dictionary
Walter A. Shumaker and George Foster Longsdorf; ed. James C. Cahill · 1922
The style of the wife of an esquire or gentleman.
Black's Law Dictionary
Henry Campbell Black, M.A. · 1910
The proper style of the wife of an esquire or a gentleman in England.
A Dictionary of Law
Henry Campbell Black · 1891
The proper style of the wife,of an esquire or a gentleman in England.