MISTRESS

noun see: master Date: 14th century a woman who has power, authority, or ownership: as, the female head of a household, a woman who employs or supervises servants, a woman who is in charge of a school or other establishment, a woman of the Scottish nobility having a status comparable to that of a master, 2. a female teacher or tutor, a woman who has achieved mastery in some field, something personified as female that rules, directs, or dominates , 4. a woman other than his wife with whom a married man has a continuing sexual relationship, sweetheart , 5. a. — used archaically as a title prefixed to the name of a married or unmarried woman Mrs. 1a