21世纪英汉大辞典解释如下：
lesson ['lesən]
n.
1. 课,功课,课业
2. (教科书中的)课
3. 一节课；一堂课
4. [复数] 教程,课程
5. 经验；教训
6. (有教益的、可供借鉴的)榜样,典范
7. 【宗教】(基督教礼拜仪式上的)圣经选读
8. 责备斥责,训斥；告诫；惩戒
vt.
[罕用语]
教；给…上课
申斥,训斥；告诫；教训
lesson ['lesən]
n.
1. a unit of instruction
he took driving lessons
2. punishment intended as a warning to others
3. the significance of a story or event
4. a task assigned for individual study
he did the lesson for today
一些相关短语：
learn a lesson 受到教训
lesson plan 教学计划,教案
teach a lesson 给…一个教训
learn one's lesson 吸取教训
object lesson 实物教学课；实际教训
以上来源于: WordNet