- a ghost.；a spy
- frighten; unnerve；(especially of an animal) take fright suddenly
noun: spook, plural noun: spooks
- 1. informal a ghost.
- 2. North American informal a spy a CIA spook
- 3. US offensive, dated a black person.
- 1. informal frighten; unnerve they spooked a couple of grizzly bears
- ▪ informal (especially of an animal) take fright suddenly he'll spook if we make any noise