1. a narrow opening or line of breakage in a surface
2. a sharp sudden sound

1. to break or split without separating completely
2. to make a sharp sudden sound
3. to solve or figure out
Usage: informal

1. highly skilled or expert
Usage: informal

Examples

• There was a crack in the wall from the earthquake.
• We heard the crack of thunder overhead.
• The ice began to crack under our weight.
• He cracked his knuckles loudly.
• The detective finally cracked the case.
• She’s a crack shot with a rifle.
• The vase cracked when it hit the floor.
• They brought in a crack team of specialists.