Definitions

1. verb

to make something sharper or more acute, especially a tool or an object

“She sharpened the knife before cutting the bread.”

2. verb

to improve or increase the effectiveness or skill of something, especially a mental ability

“The course helped sharpen his critical thinking skills.”

3. noun

the act of making something sharper or more acute

“Sharpening the blade took several hours.”

4. noun

a device or tool for sharpening something

“The whetstone was a necessary tool for sharpening knives.”