Definition of incubus noun from the Oxford Advanced American Dictionary

     

    incubus

     noun
    noun
    NAmE//ˈɪŋkyəbəs//
     
    (pl. incubi
    NAmE//ˈɪŋkyəˌbaɪ//
     
    )
     
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  1. 1 a male evil spirit, supposed in the past to have sex with a sleeping woman compare succubus
  2. 2 (literary) a problem that makes you worry a lot
See the Oxford Advanced Learner's Dictionary entry: incubus