Informal . a ghost; specter.

Slang . a ghostwriter.

Slang . an eccentric person.

Slang

Disparaging and Offensive a black person.

Slang . an espionage agent; spy.

to haunt; inhabit or appear in or to as a ghost or specter.

Informal . to frighten; scare.

Informal . to become frightened or scared

The fish spooked at any disturbance in the pool.

verb

alarm , curdle the blood , discomfort , horrify , make one’s blood run cold , make one’s teeth chatter , panic , petrify , scare away , scare stiff , scare the pants off of , scare to death , startle , strike terror into , terrify , unnerve , apparition , frighten , ghost , goblin , haunt , hobgoblin , phantom , scare , specter , spirit , terrorize

noun

apparition , bogey , bogeyman , bogle , eidolon , phantasm , phantasma , phantom , revenant , shade , shadow , specter , spirit , visitant , wraith , agent , operative