1 [U] [sing] the knowledge that sb has of a particular subject or situation 知识；认识: A basic understanding of physics is necessary for this course. 修读这门课程必须对物理学有基本认识。He has little understanding of how computers work. 他对计算机原理所知甚少。

2 [C] [usu.sing] an informal agreement 非正式协议或协议；谅解: I'm sure we can come to / reach an understandingabout the money I owe him. 关于我欠他的钱，我肯定我们能达成谅解。

3 [U] the ability to know why people behave in a particular way and to forgive them if they do sth wrong or bad 体谅；通情达理

4 [U] the way in which you think sth is meant 诠释；理解；领会: My understanding of the arrangement is that he will only phone if there is a problem. 我对安排的理解是：除非出现问题，否则他不会打电话来。