Definition of 物の怪 (もののけ)
ものけ
                        物の怪
もののけ
mononoke
noun
•
                
(vengeful) ghost, specter, spectre
Other readings:
                物の気【もののけ】
                Related Kanji
| 物 | thing, object, matter | 
| 怪 | suspicious, mystery, apparition | 
| 気 | spirit, mind, air, atmosphere, mood |