借喻是修辞手法的一种，用与被修饰对象相关的其他事物来指代被修饰对象，也称“换喻”、“转喻”。

Metonymy (/mᵻˈtɒnᵻmi/ mi-TONN-ə-mee) is a figure of speech in which a thing or concept is called not by its own name but rather by the name of something associated in meaning with that thing or concept. The words metonymy and metonym come from the Greek:μετωνυμία, metōnymía, "a change of name", from μετά, metá, "after, beyond" and -ωνυμία, -ōnymía, a suffix used to name figures of speech, from ὄνῠμα, ónyma or ὄνομα, ónoma, "name".