verb (v)

• add explanatory notes to or supply with critical comments(verb.creation)

  Example:
  The scholar annotated the early edition of a famous novel.
  

  Synonym:
  footnote
  

  source: wordnet30
• provide interlinear explanations for words or phrases(verb.communication)

  Example:
  He annotated on what his teacher had written.
  

  Synonym:
  comment, gloss
  

  source: wordnet30
• To explain or criticize by notes; as, to annotate the works of Bacon.(verb)

  source: webster1913
• To make notes or comments; -- with on or upon.(verb)

  source: webster1913