Mysterious - definition of mysterious by The Free Dictionary That which is mysterious, by being unknown or puzzling, excites curiosity or awe: a mysterious disease inscrutable applies to that which is impenetrable, so enigmatic that one cannot interpret it: an inscrutable smile
MYSTERIOUS definition and meaning | Collins English Dictionary Someone or something that is mysterious is strange and is not known about or understood He died in mysterious circumstances A mysterious illness confined him to bed for over a month The whole thing seems very mysterious