1. a device or tool used to make something sharp
2. a small device used to sharpen pencils by shaving wood and graphite

Examples

• She used a knife sharpener to restore the blade’s edge.
• The pencil sharpener on my desk needs to be emptied.
• He bought an electric pencil sharpener for his office.
• The chef always keeps his knife sharpener nearby.
• Students lined up to use the classroom pencil sharpener.
• This manual sharpener works better than the electric one.