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

1.
后视镜
a mirror in a vehicle that allows the driver to see the road and traffic behind
:
•
He checked his rearview mirror before changing lanes.
他变道前看了一眼后视镜。
•
The police car appeared suddenly in my rearview mirror.
警车突然出现在我的后视镜里。