acquaintance
noun uk/əˈkweɪn.təns/ us/əˈkweɪn.təns/
C1 [ C ]相识的人，熟人;泛泛之交
a person that you have met but do not know well
a business acquaintance 在生意上打过交道的人
[ U ] formal（用在某些表达方式中表示）认识，结识
used in some expressions about knowing or meeting people
It was at the Taylors' party that I first made his acquaintance (= first met him). 我是在泰勒家的聚会上初次和他相识的。
I wasn't sure about Darryl when I first met her, but on further acquaintance (= knowing her a little more) I rather like her. 第一次遇到达里尔时，我不确定自己对她的观感，但是随着进一步的了解，我很喜欢她。
[ U ] formal（对某一学科的）所知，了解
knowledge of a subject
Sadly, my acquaintance with Spanish literature is rather limited. 可惜，我对西班牙文学所知相当有限。
- More examples
- He gradually lost contact with all his old acquaintances.
- Professor Stevens is a professional acquaintance of mine - shall I introduce you to him?
- I recently met an old work acquaintance of mine and I hardly recognized him.
- I hope you'll consider me a friend and not just an acquaintance.
- The news quickly spread around all our friends and acquaintances.
Idiom
have a passing/slight/nodding acquaintance with somethingidiom formal 对…所知甚少
to have very little knowledge or experience of a subject
I'm afraid I have only a nodding acquaintance with his works. 恐怕我对他作品的了解只是皮毛而已。