rearview mirror

US /ˈrɪr.vjuː ˌmɪr.ər/
UK /ˈrɪr.vjuː ˌmɪr.ər/
"rearview mirror" picture
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。