extracurricular

形容词 extracurricular:

1. outside the regular academic curriculum
2. outside the regular duties of your job or profession
3. characterized by adultery
   同义词：adulterous, extramarital

1. Nathan has extracurricular activities. He's on the basketball team.
   纳森参加了很多课外活动，他是个篮球队员。　
2. John has extracurricular activities. He's on the football team.
   这是我进入学院的第一年，我是新生。约翰参加了很多课外活动，他是个足球队员。
3. We should take active part in extracurricular activities.
   我们应该积极参加课外活动。

ex.tra.cur.ric.u.lar

adj.（形容词）
Being outside the regular curriculum of a school or college:
课程以外的：在学校或学院设置的固定的课程以外的：
例句：
Sports and drama are the school`s most popular extracurricular activities.
体育和戏剧是学校最流行的课外活动

Being outside the usual duties of a job or profession:
业余的：在平常工作或职业的义务之外的：
例句：
The attorney`s work for the legal aid society was extracurricular.
律师对社会予以合法的援助是业余的

Informal Extramarital.
【非正式用语】 私通的