WordWeb Online

1. A ghostly appearing figure
   "we were unprepared for the fantasm that confronted us";
   - apparition, phantom, phantasm, phantasma, specter [US], spectre [Brit, Cdn]
    
2. Something existing in perception only
   "a ghostly fantasm at midnight";
   - apparition, phantom, phantasm, phantasma, shadow

Derived forms: fantasms

Type of: disembodied spirit, illusion, semblance, spirit