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

1.
espejo retrovisor
a mirror in a vehicle that allows the driver to see the road and traffic behind
:
•
He checked his rearview mirror before changing lanes.
Revisó su espejo retrovisor antes de cambiar de carril.
•
The police car appeared suddenly in my rearview mirror.
El coche de policía apareció de repente en mi espejo retrovisor.