What does look in mean?
look in
Definition
To look at a mirror to see the reflected view of yourself or your surroundings.
Example sentences
I can't look in the rear-view mirror properly with that coat hanging there.
I can't look in the rear-view mirror properly with that coat hanging there.
Before pulling away, the driver looked in both mirrors to check the doorway.
Before pulling away, the driver looked in both mirrors to check the doorway.