1. [proper noun] (plurale tantum) That group of works which formed part of the Septuagint, but not of the Hebrew canon recognized by the Jews, and which is considered by some Christians to form an authentic part of Scripture, but which is rejected by other (namely by Protestants).
2. [noun] (obsolete) Something, as a writing, that is of doubtful authorship or authority (formerly also used attributively).
3. [noun] 14 books of the Old Testament included in the Vulgate (except for II Esdras) but omitted in Jewish and Protestant versions of the Bible; eastern Christian churches (except the Coptic Church) accept all these books as canonical; the Russian Orthodox Church accepts these texts as divinely inspired but does not grant them the same status.