English

Definition of mysterious adjective from the Oxford Advanced Learner's Dictionary

      

    mysterious

     adjective
    adjective
    BrE BrE//ˈstɪəriəs//
     
    ; NAmE NAmE//ˈstɪriəs//
     
     
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  1. 1  difficult to understand or explain; strange He died in mysterious circumstances. A mysterious illness is affecting all the animals.
  2. 2  (especially of people) strange and interesting because you do not know much about them synonym enigmatic A mysterious young woman is living next door.
  3. 3(of people) not saying much about something, especially when other people want to know more He was being very mysterious about where he was going.
  4. Word Origin late 16th cent.: from French mystérieux, from mystère ‘mystery’.Extra examples Her last years remain somewhat mysterious She found the people mysterious and fascinating. The gardens looked dark and mysterious in the twilight. The whole thing was very mysterious. This business is getting more and more mysterious.
See the Oxford Advanced American Dictionary entry: mysterious