an ‧ no ‧ tate /ˈænəteɪt/ BrE AmE verb [transitive usually passive]
[ Date: 1700-1800 ; Language: Latin ; Origin: past participle of annotare , from ad- 'to' + notare 'to mark' ]
to add short notes to a book or piece of writing to explain parts of it:
an annotated edition of ‘Othello’
—annotation /ˌænəˈteɪʃ ə n/ noun [uncountable and countable]