Synonyms: annotating, annotation
Definition: the act of adding notes
Similar words: expanding upon, expansion
Definition: adding information or detail
Synonyms: annotation, notation, note
Definition: a comment or instruction (usually added)
Usage: his notes were appended at the end of the article; he added a short notation to the address on the envelope
Similar words: comment, commentary
Definition: a written explanation or criticism or illustration that is added to a book or other textual material
Usage: he wrote an extended comment on the proposal