eraser

noun

1. 1.One who erases.
2. 2.A thing used to erase or remove something written or drawn by a pen or a pencil.
3. 3.A thing used to erase something written by chalk on a chalkboard, by marker on a whiteboard, or by some other erasable implement; a chalkboard eraser, whiteboard eraser, etc.
4. 4.An overwriter program used to prevent data recovery.