Webster’s Revised Unabridged Dictionary · 1913
Commentary
Com′men·ta·ry (kŏm′mĕn·tā·ry̆), n.; pl. Commentaries (#). [L. commentarius, commentarium, note book, commentary: cf. F. commentaire. See Comment, v. i.] 1. A series of comments or annotations; esp., a book of explanations or expositions on the whole or a part of the Scriptures or of some other work.
This letter . . . was published by him with a severe commentary. Hallam.
2. A brief account of transactions or events written hastily, as if for a memorandum; — usually in the plural; as, Caesar's Commentaries on the Gallic War.