• The term is used in two senses. It is applied first to a book or document whose contents are invested with a special authority, in virtue of which the work is called authentic. In its second sense it is used as a synonym for 'genuine', and therefore means that a work really emanates from the author to whom it is ascribed
Catholic Encyclopedia. Kevin Knight. 2006.
Authentic
† Catholic_Encyclopedia ► Authentic
The term is used in two senses. It is applied first to a book or document whose contents are invested with a special authority, in virtue of which the work is called authentic. In its second sense it is used as a synonym for "genuine", and therefore means that a work really emanates from the author to whom it is ascribed. The article VULGATE explains the first sense of the word; the articles on the single books of Sacred Scripture illustrate the second.
F.X.E. ALBERT
Transcribed by Joseph P. Thomas
The Catholic Encyclopedia, Volume VIII. — New York: Robert Appleton Company. Nihil Obstat. 1910.
Catholic encyclopedia.