reversemarker

noun
UK /rɪˈvɜːsˌmɑːkə/
US /rɪˈvɜːrsˌmɑːrkər/

A special pen whose ink can be erased or changed back.

She used a reversemarker to fix her mistake on the poster.


OTHER MEANINGS

2. A tool that marks the opposite direction on a path or map.

The reversemarker showed us where to turn back.

3. A label that shows something is turned the other way.

The reversemarker on the shirt told us it was inside out.

4. A sign that points to the reverse side of something.

Follow the reversemarker to find the back entrance.