1 [C] [with.sop] a group of students who are taught together 班级: Jane and I are in the same class at school. 珍妮在学校跟我同班。The whole class is/are going to the theatre tonight. 今晚整个班级去看戏。

2 [C,U] a lesson 上课；课: Classes begin at 9 o'clock in the morning. 早上9时开始上课。We watched an interesting video in class(= during the lesson)yesterday. 昨天我们在课堂上看了一部挺有趣的录像片。

3 [U] [C] the way people are divided into social groups; one of these groups 阶级；阶层: The idea of class still divides British society. 当今的英国社会仍受阶级观念支配。class differences 阶级差异

4 [C] (technical术语) a group of animals, plants, words, etc of a similar type 类别；纲: There are several different classes of insects. 昆虫有好些不同的纲。 A class is smaller than a phylum. 纲(class)小于门(phylum)。

5 [U] (informal 非正式) high quality or style 优等；上乘；优秀: Pele was a football player of great class. 比利是个一流的足球员。

6 [C] (especially in compounds 尤用于构成复合词) each of several different levels of service that are available to travellers on a plane, train, etc （飞机、火车等舱位或车厢的）等级: a first-class carriage on a train 火车上的头等车厢He always travels business class. 他旅行总是坐商务舱。

7 [C] (Brit 英) (used to form compound adjectives 用于构成复合形容词) a mark that you are given when you pass your final university exam 等，级（大学毕业考试的成绩）: a first-/second-/third-class degree 一等╱二等╱三等学位