Princeton's WordNet

1. eraser(noun)

   an implement used to erase something

Kernerman English Learner's Dictionary

1. eraser(noun)ɪˈreɪ sər

   a piece of rubber for removing pencil marks

   ***Use a good eraser.

2. eraserɪˈreɪ sər

   a soft object for removing writing from a blackboard or white board

   ***Clean the erasers.

Wiktionary

1. eraser(Noun)

   A thing 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. eraser(Noun)

   A thing used to erase something written by chalk on a chalkboard; chalkboard eraser.

3. eraser(Noun)

   An overwriter program used to prevent data recovery.

Webster Dictionary

1. Eraser(noun)

   one who, or that which, erases; esp., a sharp instrument or a piece of rubber used to erase writings, drawings, etc

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