'近义词' (jìn yì cí) literally means 'near-meaning word' — '近' (jìn) means 'close' or 'near', '义' (yì) means 'meaning', and '词' (cí) means 'word'. Together, they refer to words that have similar or nearly identical meanings in context, such as 'happy' and 'joyful' in English. These are not always interchangeable, because subtle differences in connotation, formality, or usage domain often apply.

This term is commonly used in Chinese language learning, dictionary entries, and classroom instruction. Learners encounter 近义词 when expanding vocabulary or refining expression — for example, choosing between '美丽' (měilì) and '漂亮' (piàoliang), both meaning 'beautiful', but differing in register and collocation. Dictionaries often list 近义词 alongside definitions to help users grasp semantic nuance and select the most appropriate word for a given situation.