an·no·tate / ˈanəˌtāt/ • v. [tr.] add notes to (a text or diagram) giving explanation or comment: documentation should be annotated with explanatory notes.DERIVATIVES: an·no·tat·a·ble adj.an·no·ta·tor / -ˌtātər/ n.

ANNOTATION

A note, summary, or commentary on some section of a book or a statute that is intended to explain or illustrate its meaning.

An annotation serves as a brief summary of the law and the facts of a case and demonstrates how a particular law enacted by Congress or a state legislature is interpreted and applied. Annotations usually follow the text of the statute they interpret in annotated statutes.

annotate XVIII. f. pp. stem of L. annotāre, f. AN-1 + nota mark, NOTE.
So annotation XV. — F. or L.

annotation Explanation added to a program to assist the reader. This may take the form of manuscript additions to the program listing, but more often takes the form of comments included in the program text.