sister

noun

1. 姐；妹
   a girl or woman who has the same mother and father as another person
   1. She's my sister.
      她是我姐姐。
   2. an older/younger sister
      姐姐；妹妹
   3. a big/little/kid sister
      大姐；小妹；年幼的妹妹
   4. We're sisters.
      我们是姐妹。
   5. Do you have any brothers or sisters ?
      你有兄弟姐妹吗？
   6. My best friend has been like a sister to me (= very close) .
      我最要好的一个朋友待我亲如姐妹。
2. （称志同道合者）姐妹
   used for talking to or about other members of a women's organization or other women who have the same ideas, purpose, etc. as yourself
   1. They supported their sisters in the dispute.
      在争论中，她们支持自己的姐妹。
3. 护士长
   a senior female nurse who is in charge of a hospital ward
4. 女教友；（尤指）修女
   a female member of a religious group, especially a nun
   1. Sister Mary
      修女玛丽
   2. the Sisters of Charity
      仁爱修女会
5. （美国大学）女生联谊会会员
   (in the US) a member of a sorority (= a club for a group of female students at a college or university)
6. （黑人的互相称谓）大姐
   used by black people as a form of address for a black woman
7. 同类型的；同一批的；如同姐妹的
   a thing that belongs to the same type or group as sth else
   1. our sister company in Italy
      我们在意大利的姊妹公司
   2. a sister ship
      同一类型的船

1. See also: His sister Sarah helped him. ...Vanessa Bell, the sister of Virginia Woolf... I didn't know you had a sister. half-sister stepsister

Note that there is no common English word that can refer to both a brother and a sister. You simply have to use both words. She has 13 brothers and sisters. The word sibling exists, but it is very formal.
注意英语中没有统称兄弟姐妹的常用词，所以在谈及兄弟姐妹的时侯，必须同时使用 brother 和 sister：She has 13 brothers and sisters (她有 13 个兄弟姐妹)。sibling 可以统称兄弟姐妹，但非常正式。

2. N-COUNT; N-TITLE; N-VOC 修女;女教友
   Sister is a title given to a woman who belongs to a religious community.
   1. Sister Francesca entered the chapel.
      弗朗西丝卡修女走进了小教堂。
   2. ...the Hospice of the Sisters of Charity at Lourdes.
      卢尔德仁爱修女会的安养院
3. N-COUNT; N-TITLE; N-VOC 护士长;高级护士
   A sister is a senior female nurse who supervises part of a hospital.
   1. Ask to speak to the sister on the ward...
      请求和病房里的护士长说话。
   2. Sister Middleton followed the coffee trolley.
      护士长米德尔顿跟在送咖啡的推车后面。
4. N-COUNT (同一种族、宗教、国家或职业的)姐妹;同道中的女性;志同道合的女士
   You can describe a woman as your sister if you feel a connection with her, for example because she belongs to the same race, religion, country, or profession.
   1. Modern woman has been freed from many of the duties that befell her sisters in times past.
      现代女性已经从许多压在旧时女性身上的责任中解放出来了。
   2. ...our Jewish brothers and sisters.
      我们犹太教的兄弟姐妹们
5. ADJ 同类型的;相关联的;如同姐妹的
   You can use sister to describe something that is of the same type or is connected in some way to another thing you have mentioned. For example, if a company has a sister company, they are connected.
   1. ...the International Monetary Fund and its sister organisation, the World Bank.
      国际货币基金组织及其姊妹机构——世界银行
   2. ...Voyager 2 and its sister ship, Voyager 1.
      “旅行者 2 号”太空探测器及其姊妹探测器——“旅行者 1 号”

1. She had been babysitting him and his four-year-old sister.
   她一直都在照看他和他4岁的妹妹。
2. My sister still claims she cheated on us at cards, but I know better.
   我妹妹仍然说她和我们玩牌的时候捣了鬼，其实我心知肚明。
3. My sister's given me this brilliant book.
   我的姐姐给了我这本非常好看的书。
4. My sister was always a lot cleverer than I was
   我妹妹向来比我聪明许多。
5. He had very little in common with his sister.
   他和姐姐几乎没有什么共同语言。
6. My sister Yvonne also came to live at Ockenden Cottage with me.
   姐姐伊冯娜也来到奥克肯登小屋和我一起住了。
7. Penelope came forward and embraced her sister
   佩内洛普走上前拥抱了她妹妹。
8. His sister said he had deliberately given the hospital a false name and address.
   他姐姐说他故意给医院留了假名字和假地址。
9. As a child she fought with her younger sister
   她小时候会和妹妹打架。
10. My kid sister woke up and started crying.
    我妹妹醒了，哭了起来。
11. She led a normal, happy life with her sister and brother
    她和弟弟妹妹一起过着平凡而幸福的生活。
12. She made liberal use of her elder sister's make-up and clothes.
    她随便把姐姐的化妆品和衣服拿来用。
13. Now that she was retired she lived with her sister.
    现在她已经退休了，和姐姐一起住。
14. My sister smeared herself with suntan oil and slept by the swimming pool all day.
    我姐姐抹了些防晒油，一整天睡在游泳池边。
15. The parting from his sister had a positive effect on John
    和姐姐分开对约翰来说有好处。
16. His sister Sarah helped him.
    他姐姐萨拉帮助了他。
17. I didn't know you had a sister.
    我当时并不知道你还有个姐姐。
18. Sister Francesca entered the chapel.
    弗朗西丝卡修女走进了小教堂。
19. Ask to speak to the sister on the ward
    请求和病房里的护士长说话。
20. Sister Middleton followed the coffee trolley.
    护士长米德尔顿跟在送咖啡的推车后面。
21. Modern woman has been freed from many of the duties that befell her sisters in times past.
    现代女性已经从许多压在旧时女性身上的责任中解放出来了。
22. Imogen stayed with her widowed sister.
    伊莫金和她守寡的姐姐住在一起。
23. The person you saw yesterday was not her, but her elder sister.
    昨天你看见的不是她，（而）是她姐姐。
24. My sister was the partner of my walks.
    我妹妹是同我一同散步的伙伴。
25. I regarded her as my own sister.
    我把她看作自己的妹妹。
26. They all called her “ Big Sister ”.
    他们都管她叫“大姐姐”。
27. I coaxed my sister into taking me to the theatre.
    我用好话哄姐姐带我去看戏。
28. My sister's taste in dresses is adverse to my own.
    我妹妹的服饰审美观完全与我相反。
29. I met your sister on the way.
    我在路上碰到你妹妹了。
30. I asked your sister to communicate my wishes to you.
    我请你的妹妹向你转达我的祝愿。

noun

1. (slang) sometimes used as a term of address for attractive young women

   Synonym:    babybabe

2. a female person who is a fellow member of a sorority or labor union or other group
   1. none of her sisters would betray her

3. a female person who has the same parents as another person
   1. my sister married a musician

   Synonym:    sis