1 (onlybeforea noun 只用于名词前) existing in nature; not made or caused by human beings 存在于自然界的；天然的: I prefer to see animals in their natural habitat rather than in zoos. 我喜欢动物在自然环境中生活，不愿看见它们在动物园里。 Britain's natural resources include coal, oil and gas. 英国的天然资源包括煤、石油及天然气。 She died of natural causes (= of old age or illness). 她死于自然。

2 usual or normal 通常的；正常的: It's natural to feel nervous before an interview. 在面试之前感到紧张是人之常情。 [OPP] unnatural 反义词为unnatural

3 that you had from birth or that was easy for you to learn 天生的；天赋的；与生俱来的: a natural gift for languages 语言天分

4 (onlybeforea noun 只用于名词前) (used about parents or their children) related by blood （指父母或其子女）亲生的，有血统关系的: She's his stepmother, not his natural mother. 她是他的继母，不是生母。

5 (in music) used after the name of a note to show that the note is neither SHARP(= half a note higher), nor FLAT(= half a note lower). The written symbol is (♮). （音乐）本位的（用于音符名称后，书面符号是♮）: B natural B本位音