key word

• 作为密码或代码线索的词；标题或文档中表示内容的关键词，尤用于索引；主题或领域的核心词。

A word that serves as a key to a code or cipher; a significant word from a title or document used especially as an index to content; a word that is a major element of a subject or field.

1. Important wordB1formal

   A word that is significant or essential in a particular context, often used for searching or summarizing.

   关键词

   • The key word in the document is 'sustainability'.
   • Use key words to find relevant articles online.
   • The teacher highlighted the key words in the lesson.

2. Password or codeB2informal

   A word used as a password or to gain access to something.

   暗语

   • You need to enter the key word to unlock the door.
   • The key word for the secret meeting was 'eagle'.
   • He forgot the key word to his account.