<p><strong>Noun, plural</strong></p><ul><li>anything that is kept secret or remains unexplained or unknown: the mysteries of nature.</li><li>any affair, thing, or person that presents features or qualities so obscure as to arouse curiosity or speculation: The masked guest is an absolute mystery to everyone.</li><li>a novel, short story, play, or film whose plot involves a crime or other event that remains puzzlingly unsettled until the very end: a mystery by Agatha Christie.</li><li>obscure, puzzling, or mysterious quality or character: the mystery of Mona Lisa's smile.</li><li>any truth that is unknowable except by divine revelation.</li><li>a sacramental rite.</li><li>an incident or scene in connection with the life of Christ, regarded as of special significance: the mysteries of the Passion.</li><li>any of the 15 events in the lives of Christ and the Virgin Mary meditated upon during the recitation of the rosary.</li><li>ancient religions that admitted candidates by secret rites and rituals the meaning of which was known only to initiated worshipers.</li><li>any rites or secrets known only to those initiated: the mysteries of Freemasonry.</li><li>the Eucharistic elements.</li><li>mystery play.</li></ul>