usage/'juːsɪʤ/

n. the way that words are used in a language

n. [U; C] 用法：There are a lot of differences between British and American usage. 英式用法和美式用法之间有很大的差异。

◇an uncommon usage 一种不太常见的用法

构词use + -age

用法usage用作不可数时，泛指“惯用法”；a usage指“一种惯用法”。