an·no·ta·tion 
/ˌænəˈteɪʃən/ noun
plural an·no·ta·tions /ˌænəˈteɪʃən/ noun 1 [count] : a note added to a text, book, drawing, etc., as a comment or explanation
▪ Without the annotations, the diagram would be hard to understand. 2 [noncount] : the act of adding notes or comments to something : the act of annotating something
▪ the author's annotation of the diagram
▪ Without the annotations, the diagram would be hard to understand.
▪ the author's annotation of the diagram
