借代，是指以一个物品来代替其他东西出现一种修辞方式，通常用于修饰文句，又称“提喻”，与转喻（借喻）有区别。

借代就是不直接把人或事物的名称直接说出来，而用跟它关系密切的事物名称，或它本身的属性来代替的一种修辞法。

A synecdoche (/sɪˈnɛkdəkiː/, si-NEK-də-kee; from Greek συνεκδοχή, synekdoche, lit. "simultaneous understanding") is a figure of speech in which a term for a part of something refers to the whole of something or vice versa. A synecdoche is a class of metonymy, often by means of either mentioning a part for the whole or conversely the whole for one of its parts. Examples from common English expressions include "bread and butter" (for "livelihood"), "suits" (for "businesspeople"), and "boots" (for "soldiers"). Synecdoche also appears in the use of government buildings to refer to their occupant or agency, as "No. 10" for the British Prime Minister or "The Pentagon" for the United States Department of Defense.