backwardsign
nounUK /ˈbækwəd saɪn/
US /ˈbækwərd saɪn/
A backwards sign is a sign that points or faces the wrong way.
The backwards sign sent us down the wrong street.
OTHER MEANINGS
2. A sign whose letters or symbols are printed in reverse order.
The backwards sign on the window read 'NEPO' instead of 'OPEN'.
3. A signal that gives the opposite of the intended instruction.
The backwards sign told drivers to turn left when they should have turned right.
4. A gesture or motion made in the opposite direction from what is expected.
He gave a backwards sign with his thumb, pointing behind him instead of ahead.