— mistressed , adj. — mistress-ship , n.
/mis"tris/ , n.
1. a woman who has authority, control, or power, esp. the female head of a household, institution, or other establishment.
2. a woman employing, or in authority over, servants or attendants.
3. a female owner of an animal, or formerly, a slave.
4. a woman who has the power of controlling or disposing of something at her own pleasure: mistress of a great fortune.
5. ( sometimes cap. ) something regarded as feminine that has control or supremacy: Great Britain, the mistress of the seas.
6. a women who is skilled in something, as an occupation or art.
7. a woman who has a continuing, extramarital sexual relationship with one man, esp. a man who, in return for an exclusive and continuing liaison, provides her with financial support.
8. Brit. a female schoolteacher; schoolmistress.
9. ( cap. ) a term of address in former use and corresponding to Mrs., Miss, or Ms.
10. Archaic. sweetheart.
[ 1275-1325; ME maistresse maistre MASTER + -esse -ESS ]
Usage . See -ess .