A profound secret; something wholly unknown, or something kept cautiously concealed, and therefore exciting curiosity or wonder; something which has not been or can not be explained; hence, specifically, that which is beyond human comprehension.

A kind of secret religious celebration, to which none were admitted except those who had been initiated by certain preparatory ceremonies; -- usually plural; as, the Eleusinian mysteries.

the secret or specialized practices or ritual peculiar to an occupation or a body of people; rites or secrets known only to those initiated

used in two different ways in dramatic literature, it can be a medieval play about any of the fifteen events in the lives of Jesus and Mary, or it can be a play focusing on the unexplained, secret, or unknown, usually with a revelation in the final resolution. Modern Example: "Two Bottles of Relish," a mystery by Lord Dunsany, 2m2f.

a story about a crime (usually murder) presented as a novel or play or movie

a novel of deception and detection

a story where clues are given, slowly at first, with a few red herrings along the way, with a conclusion that seals the deal in a logical manner and (sometimes) leaves an open end or two for extra spice

a story where one or more false stories cover a true story, which must be discovered as part of the narrative

Anything artfully made difficult; an enigma.

a enigma which man is unable to logically penetrate

a sacred thing which is difficult to understand

a sacred thing which is difficult to understnad