语言中的量是有关事物、事件或者性状的大小、范围、程度等的范畴，量范畴形成一个系统。汉语量范畴系统分为量类和量值两个次系统。量类次系统根据指涉的对象在语言符号系统内外而分为语言的量和事物的量，其中，语言的量进一步分为语气量和情感量，而事物的量首先依据在量范畴系统中的地位分为基本量类和派生量类。派生量类是在基本量类基础上增加特定的参数得到的，这些参数是开放的。量值次系统主要有大小、界限、比例和次序。量类和量值的组合可以确定一个量。

Quantity is a linguistic category about the size, scope and degree of things, events, properties or state of something. And the quantity categories in a language constitute a system. The Chinese one is made of two subsystems: type system and value system. While the value system can be divided into linguistic quantity and substantial quantity in terms with whether the reference of the forms is within or out of the language sign system, the linguistic quantity includes mood quantity and affection quantity. The substantial quantity falls into two subcategories: the basic and the derived, with the latter formed by adding some parameters to the former. And the value system mainly refers to the value, limit, ratio, or order of values. A certain quantity can be defined by its type and value.