Mystery

• In modern colloquial English, a mystery is a subgenre of detective fiction(see Mystery fiction)
• Also in modern colloquial English, a mystery is something which is unknown.
• Originally mystery was a religious term. A mystery was a rite into which only the initiated were admitted. See in particular the article on mystery religion. In Eastern Christianity, and to a lesser extent in Catholicism, the seven sacraments are sometimes called "mysteries"; that nomenclature is perhaps inherited from ancient Greek religions.
• Another sense of the word mystery is defined by the Catholic Encyclopedia as "a supernatural truth ... that of its very nature lies above the finite intelligence".