The image in a plane mirror is laterally inverted with respect to the object.
We know that in an image formed by a mirror, the left of the object appears on the right and the right of the object appears on the left.
This left-right reversal of an object and its mirror image is called lateral inversion.
For example, The word ‘AMBULANCE’ is written laterally inverted in front of an ambulance. When the driver of a vehicle ahead of an ambulance looks in his/her rearview mirror, he/she can read ‘AMBULANCE’ written on it.