spectre


spectre (http://definr.com/spectre)

     n 1: a ghostly appearing figure; "we were unprepared for the
          apparition that confronted us" [syn: apparition, phantom,
           specter]
     2: a mental representation of some haunting experience; "he
        looked like he had seen a ghost"; "it aroused specters
        from his past" [syn: ghost, shade, spook, wraith,
        specter]