If something happens sharply, it occurs abruptly and intensely. You may hear newscasters gloomily reporting that the price of gas is rising sharply.
The value of your baseball cards might rise sharply, inspiring you to sell a few of them. A car you're riding in can also swerve sharply, jerking suddenly to the left. You can also describe something that's distinct, clear, or detailed using this adverb: "I love how sharply defined the moon is in your photograph." And finally, if someone speaks sharply, they use a voice so harsh and angry that it seems to have a sharp edge.