Dictionary.net

put into focus; as of an image on a screen; "Please focus the image; we cannot enjoy the movie"

become sharp or sharper; "The debate sharpened"

make sharp or sharper; "We had to sharpen our arguments"

give a point to; "The candles are tapered"

raise the pitch of (musical notes)

make sharp or sharper; "sharpen the knives"

become sharp or sharper; "The debate sharpened"

make sharp or sharper; "We had to sharpen our arguments"

give a point to; "The candles are tapered"

raise the pitch of (musical notes)

make sharp or sharper; "sharpen the knives"

put (an image) into focus; "Please focus the image; we cannot enjoy the movie"

make (one's senses) more acute; "This drug will sharpen your vision"

make (images or sounds) sharp or sharper

To make sharp.

To give a keen edge or fine point to; to make sharper; as, to sharpen an ax, or the teeth of a saw.

To render more quick or acute in perception; to make more ready or ingenious.

To make more eager; as, to sharpen men's desires.

To make more pungent and intense; as, to sharpen a pain or disease.

To render more shrill or piercing.

To make more tart or acid; to make sour; as, the rays of the sun sharpen vinegar.

To grow or become sharp.

To make sharp.

To give a keen edge or fine point to; to make sharper; as, to sharpen an ax, or the teeth of a saw.

To render more quick or acute in perception; to make more ready or ingenious.

To make more eager; as, to sharpen men's desires.

To make more pungent and intense; as, to sharpen a pain or disease.

To render more shrill or piercing.

To make more tart or acid; to make sour; as, the rays of the sun sharpen vinegar.

To grow or become sharp.

To make sharp or sharper; give edge or point to; make more acute.

To become sharp.

To make sharp or keen: to give edge or point to: to make pungent or painful: to make severe: to make eager, active, or acute.

To grow sharp.

To grow sharp.

To make sharp or keen; to make more eager, pungent, sarcastic, acid, shrill, or distressing.

To make, or grow, sharp.

To make or become sharp.

To make sharp or keen; to render quick or eager; in music, to raise a note a semitone; to make sharp or acid; to become sharp.