"So how much interracial contact does Thomas have being the sole spook that sits by the door?"

Now in what context is the word "spook" being used in the above sentence?
There seems to be several definitions of this word:
1. A type of spirit in native American folk lore
2. A colloquial term for a spy
3. An alternative term for a ghost
4. Spook (band), an Australian trip-hop band.
5. Spook: Science Tackles the Afterlife, a book about the afterlife by Mary Roach
6. A racial slur for a black person.
7. A character from The Wardstone Chronicles
I sincerely hope that racial slurs are not acceptable in any discussion here on the Mudcat regardless of who is being discussed. So, if this is the case, I will take it that #6 on the above list is NOT the intended definition.