Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun annotation

2 senses of annotation

Sense 1
note, annotation, notation -- (a comment or instruction (usually added); "his notes were appended at the end of the article"; "he added a short notation to the address on the envelope")
       => comment, commentary -- (a written explanation or criticism or illustration that is added to a book or other textual material; "he wrote an extended comment on the proposal")

Sense 2
annotation, annotating -- (the act of adding notes)
       => expansion, expanding upon -- (adding information or detail)