an informal name for someone or something, especially a name that you are called by your friends or family, usually based on your real name or your character

We always use the nickname Bee for our daughter Elizabeth.

"Darwin" was the nickname he was given at high school, because of his interest in science. 他上高中的时候外号叫“达尔文”，因为他对科学很感兴趣。

Synonyms: handle (NAME) moniker name sobriquet