- Informal a specter; ghost
- Slang a spy or secret agent
Origin of spookDu, akin to German spuk
- to haunt (a person or place)
- to startle, frighten, make nervous, annoy, etc.
Informal to become frightened or startled: a horse that spooks easily
- Informal A ghost; a specter.
- Slang A secret agent; a spy.
- Offensive Slang Used as a disparaging term for a black person.
verbspooked, spook·ing, spooks
- To haunt.
- To startle and cause nervous activity in; frighten: The news spooked investors, and stock prices fell.
To become frightened and nervous.
Origin of spookDutch from Middle Dutch spooc
(third-person singular simple present spooks, present participle spooking, simple past and past participle spooked)