名詞 mistress:

1. an adulterous woman; a woman who has an ongoing extramarital sexual relationship with a man
   同義詞：kept woman, fancy woman
2. a woman schoolteacher (especially one regarded as strict)
   同義詞：schoolmarm, schoolma'am, schoolmistress
3. a woman master who directs the work of others

1. If there were no husband, who will look after our mistress?
   要是人間沒了丈夫，試問誰會照顧我們這些主婦？
2. The poet addressed many poems to his mistress, praising her beauty.
   這位詩人為他心愛的女子寫了許多詩，歌頌她的美麗。
3. The dog ran alongside his mistress.
   狗在女主人的身邊奔跑。

mis.tress

n.（名詞）
A woman in a position of authority, control, or ownership, as the head of a household:
主婦：做家庭主婦，處于權(quán)威者、控制者或所有者地位的婦女：
例句：
.Thirteen years had seen her mistress of Kellynch Hall.(Jane Austen)
.十三年來看她一直作著凱林克府第的女主人.(簡·奧斯汀)

A woman owner of an animal or a slave.
女主人：一個動物或一個奴隸的女性擁有者
A woman with ultimate control over something:
女主人：對某事有最終控制的女人：
例句：
the mistress of her own mind.
她自己心靈的主人

A nation or country that has supremacy over others:
霸主：對其它國有控制權(quán)的一個民族或國家：
例句：
Great Britain, once the mistress of the seas.
英國，曾一度是海上霸主

Something personified as female that directs or reigns:
女統(tǒng)治者：被擬人化成能指揮或統(tǒng)治的女性的某事物：
例句：
.my mistress . . . the open road.(Robert Louis Stevenson)
.開闊的大路…我的主人.(羅伯特·路易斯·史蒂文森)

A woman who has mastered a skill or a branch of learning:
女能手：掌握一技之長或一門學(xué)問的女性：
例句：
a mistress of the culinary art.
烹調(diào)高手

A woman who has a continuing sexual relationship with a usually married man who is not her husband and from whom she generally receives material support.
情婦：與通常是已婚但又不是自己丈夫的男子保持長久的性關(guān)系，并從他那里得到物質(zhì)支持的女人
Mistress Used formerly as a courtesy title when speaking to or of a woman.
Mistress 女士，夫人：與女性交談或談及一位女性時，用作禮貌稱謂
Chiefly British A woman schoolteacher.
【多用于英國】 女教師

來源：
Middle English maistresse
中古英語 maistresse
from Old French [feminine of] maistre [master]
源自 古法語 [] maistre的陰性詞 [男主人]
from Latin magister * see master
源自 拉丁語 magister *參見 master