1. a ghost or spirit
Usage: informal
2. a spy or secret agent
Usage: slang

1. to frighten or startle suddenly
2. to become frightened or nervous

Examples

• The old house was said to be haunted by spooks.
• The children dressed up as spooks for Halloween.
• The loud noise spooked the horses.
• Don’t let the strange sounds spook you.
• The cat spooked when the door slammed shut.
• She spooked easily during horror movies.
• The sudden movement spooked the deer in the forest.