Guideword Definition

gīdwûrd
noun
A word or term that appears at the top of each page or column in a reference book, such as a dictionary, to indicate the first or last entry on the page.
American Heritage

A watchword; a word or phrase that serves as one's guide.

Wiktionary

(chiefly business) Any of the words in a memo or email that define metadata regarding the message, such as sender, recipient, and subject.

Wiktionary
Synonyms:

Other Word Forms of Guideword

Noun

Singular:
guideword
Plural:
guidewords

Origin of Guideword

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