affair
/əˈfeə(r)/noun
1
- an event or sequence of events of a specified kind or that has previously been referred to（某种特定的或先前提及的）事件; 一系列事件：
the board admitted responsibility for the affair
委员会承认对该事负责
I wanted the funeral to be a family affair.
我希望葬礼只是自家的事情。
1.1
- a matter that is a particular person's concern or responsibility个人的事：
what you do in your spare time is your affair.
你闲暇时做什么是你自己的事。
1.2
affairs
matters of public interest and importance公共事务：commissions were created to advise on foreign affairs.
成立委员会咨询外交事务。
1.3
affairs
business and financial dealings商务和金融交易：his time was spent in winding up his affairs.
他的时间都用在料理停当生意上了。
1.4
- with adj. informal an object of a particular type〈非正式〉物件, 东西：
her dress was a black low-cut affair.
她的礼服是黑色低胸的。
2
- a love affair风流韵事, 私通：
his wife is having an affair.
他妻子正在婚外恋。
词源
Middle English: from Old French afaire, from à faire 'to do'; compare with ADO.