| Noun | 1. | spook - someone unpleasantly strange or eccentric | |
| 2. | spook - a mental representation of some haunting experience; "he looked like he had seen a ghost"; "it aroused specters from his past" | |
| Verb | 1. | spook - frighten or scare, and often provoke into a violent action; "The noise spooked the horse" | |