I. -ˌnōt noun
Date: 1607
1. : a note of reference, explanation, or comment usually placed below the text on a printed page
2.
a. : one that is a relatively subordinate or minor part (as of an event, work, or field)
a movement now regarded as a footnote to architectural history
b. : commentary 3a
II. transitive verb
Date: 1864
: to furnish with a footnote : annotate