'Footnote' definitions:

Definition of 'footnote'

From: WordNet
noun
A printed note placed below the text on a printed page [syn: footnote, footer]
verb
Add explanatory notes to or supply with critical comments; "The scholar annotated the early edition of a famous novel" [syn: annotate, footnote]

Definition of 'Footnote'

From: GCIDE
  • Footnote \Foot"note`\, n. A note of reference or comment at the foot[4] of a page. [1913 Webster]

Synonyms of 'footnote'

From: Moby Thesaurus