一词多义指一个词语有多种不同却具有互相联系的意义,是语言中的普遍现象,而这一现象与社会的发展、人类的认知过程密切相关。本文在认知理论框架下,分析了一词多义现象产生的原因,从原型范畴理论、隐喻及转喻三个方面阐述了一词多义现象。 Polysemy refers to the fact that a word has many different but interrelated meanings and is a universal phenomenon in language. And this phenomenon is closely related to the development of society and human cognition. In the framework of cognitive theory, this paper analyzes the reasons for the occurrence of polysemy and expounds the polysemy from three aspects: prototype category theory, metaphor and metonymy.