Definition of: mysterious

(mis·tir′ē·əs) adjective
Involved in or implying mystery; unexplained; obscure. [<L mysterium]
—mys·te′ri·ous·ly adverb
—mys·te′ri·ous·ness noun Synonyms: abstruse, cabalistic, dark, enigmatic, hidden, incomprehensible, inexplicable, inscrutable, mystic, mystical, obscure, occult, recondite, secret, transcendental, unfathomable, unfathomed, unknown. That is mysterious in the true sense which is beyond human comprehension; that is mystic or mystical which has associated with it some hidden or recondite meaning. See DARK, SECRET. Antonyms: see synonyms for CLEAR.