sharpen

verb

1. 1

   put (an image) into focus

   Please focus the image; we cannot enjoy the movie

2. 2

   become sharp or sharper

   The debate sharpened

3. 3

   make crisp or more crisp and precise

   We had to sharpen our arguments

4. 4

   make (one's senses) more acute

   This drug will sharpen your vision

5. 5

   give a point to

   The candles are tapered

6. 6

   raise the pitch of (musical notes)

7. 7

   make sharp or sharper

   sharpen the knives

8. 8

   make (images or sounds) sharp or sharper