Learn how to say Mistress correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word mistress:
1a woman in a position of authority or control:
she is always mistress of the situation, coolly self-possessed
[with modifier] British a female schoolteacher who teaches a particular subject:
a Geography mistress
a woman who is skilled in a particular subject or activity:
a mistress of the sound bite, she is famed for the acidity of her tongue
the female owner of a dog, cat, or other domesticated animal:
the cat rubbed itself against its mistress’s legs
archaic a female head of a household:
he asked for the mistress of the house
(especially formerly) a female employer of domestic staff:
Mary, go and fetch your mistress some cold chicken
2a woman (other than the man’s wife) having a sexual relationship with a married man:
Elsie knew her husband had a mistress tucked away somewhere
archaic or literary a woman loved and courted by a man.
3 (Mistress) archaic or dialect used as a title prefixed to the name of a married woman; Mrs.
Middle English: from Old French maistresse, from maistre ‘master’