verb

1. To inhabit, or visit frequently (most often used in reference to ghosts).

   “A couple of ghosts haunt the old, burnt-down house.”

2. To make uneasy, restless.

   “The memory of his past failures haunted him.”

3. To stalk, to follow

   “The policeman haunted him, following him everywhere.”

Synonyms: dwell, live, nag

noun

1. A particular instance of haunting; a ghostly habitation.

   “During the haunting, strange voices and noises were heard and objects flew off tables.”

adjective

1. Remaining in the mind; not easily forgotten.

   “He had a haunting gaze.”