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Webster 1913 Edition

(-nōtˊ)

Noun.

A note at the head of a page or chapter; in law reports, an abstract of a case, showing the principles involved and the opinion of the court.

head note ‎(plural headnotes)

(law) a summary of the relevant aspects of a legal case usually found at the beginning of a case report.
A note at the head of a page or chapter.