noun
Something secret or unexplainable; an unknown.
Someone or something with an obscure or puzzling nature.
An account, story, book, film, or play, often with the theme of crime or murder, with a surprise ending that explains all the strange events that have occurred.
A mystery play.
(obsolete) A secret or mystical meaning.
A religious truth not understandable by the application of human reason alone (without divine aid).
(archaic outside Eastern Orthodoxy) A sacrament.
(chiefly in the plural) A secret religious celebration, admission to which was usually through initiation.
(Catholicism) A particular event or series of events in the life of Christ.
(archaic) A craft, art or trade; specifically a guild of craftsmen.