# 2.4.14 宏类型

Lisp 宏是用户定义的控制结构。宏可以极大的拓展 Lisp 语言。宏由类似表示函数的对象表示。但是，宏的参数传递语法和函数不同。Lisp 宏是一个列表，其列表的第一个元素是符号macro，然后余下的 CDR 部分是一个 lisp 函数对象，其中包含了符号 lambda。

lisp宏 对象通常由内置的 defmacro 来定义，不过任何以 macro 开头的列表都是宏，在Emacs中也一样。查阅 宏章节，以获取如何编写宏的只是。

警告：Lisp 宏 和 按键宏 完全是两码事。当我们说到宏的时候，我们通常是在说 Lisp宏，而不是按键宏。


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