허락 없이 장소나 상황에 들어온 사람, 특히 범죄나 방해를 목적으로 하는 침입자.
A person who enters a building, grounds, or situation without permission, often with the intent to commit a crime or cause a disturbance.
예문:
"The security alarm went off the moment the intruder stepped through the broken window."
"Police are searching for an unidentified intruder who was spotted on the surveillance footage."
"The dog's loud barking frightened the intruder away before he could steal anything."