It is the list of authoritative and inspired Scriptures.
Different religions have different canons.
In Judaism the canon consists of the books of the old Testament only. In Protestant Christianity, the canon is the body of scripture comprised in the Bible consisting of the 39 books in the Old Testament and 27 in the New Testament. In Roman Catholicism , an additional eight books were added in 1546. I need to add here that Roman Catholicism maintains that the apocrypha was always inspired along with the Eastern Orthodox, Coptic and Armenian churches. The Protestant movement has not accepted the apocrypha.