guideword

Meanings

Plural: guidewords

Noun

• a word printed at the top of the page of a dictionary or other reference book to indicate the first or last item on that page
• A watchword; a word or phrase that serves as one's guide.
• A word that is printed at the top or bottom of the page in a reference work, in order to help readers find a specific entry.
• Any of the words in a memo or email that define metadata regarding the message, such as sender, recipient, and subject.

Synonyms

catchword, guide word