rearview mirror
US /ˈrɪr.vjuː ˌmɪr.ər/
UK /ˈrɪr.vjuː ˌmɪr.ər/

1.
백미러, 룸미러
a mirror in a vehicle that allows the driver to see the road and traffic behind
:
•
He checked his rearview mirror before changing lanes.
그는 차선 변경 전에 백미러를 확인했다.
•
The police car appeared suddenly in my rearview mirror.
경찰차가 갑자기 내 백미러에 나타났다.