n.

1. 女主人，主妇
   The servant told me that her mistress was not at home.

   女仆告诉我说，她的女主人不在家。

2. 女名家，女能手
   His wife is a mistress of embroidery.

   他太太是个刺绣能手。

3. 【英】女教师；女校长；女主管
   All the girls like their new English mistress.

   所有的女学生都喜欢新来的英文女教师。

4. 情妇
   He has a mistress in Paris.

   他在巴黎有个情妇。

5. 起支配作用的女子[（+of）]
   She was mistress of her temper.

   她能控制自己的脾气。

6. （有时大写）称霸的国家
7. （大写，用作称呼，现已为Miss或Mrs.所替代）小姐；夫人

n.

1. a woman in a position of authority or control.
   ▸Brit. a female schoolteacher.
   ▸the female owner of a dog, cat, etc.
   ▸archaic a female head of a household.
2. a woman skilled in a particular subject or activity:
   a mistress of the sound bite.
3. a woman (other than the man's wife) who is having a sexual relationship with a married man.
   ▸archaic or literary a woman loved and courted by a man.
4. (Mistress) archaic or dialect Mrs.