eraser

noun4

1. •
   (US, Canada) An object used to erase or remove something written or drawn by a pen or a pencil.

   • I have worn out the eraser on this pencil.
2. •
   (US, Canada) An object used to erase something written either by chalk on a chalkboard, by a marker on a whiteboard, or by some other erasable implement; a chalkboard eraser, whiteboard eraser, etc.
3. •
   An overwriter program used to prevent data recovery.
4. •
   One who erases.