noun
Refers to a person who enters a place without permission, often with a nuance of forceful or unwelcome entry. Slightly formal or literary.
深夜、闖入者が家の中に入ってきた。
Late at night, an intruder came into the house.
彼は私有地に闖入者として扱われた。
He was treated as a trespasser on the private property.