1 [U] (formal 正式) the act of writing letters; the letters themselves 通信；信件: There hasn't been any correspondence between them for years. 他们已多年没有通信。

2 [C,U] a close connection or relationship between two or more things 密切的联系或关系: There is no correspondence between the two sets of figures. 两组数字之间没有关联。