1. a powerful pneumatic drill used for breaking up concrete, pavement, or rock

1. to break up or drill with a jackhammer
2. to strike or hit repeatedly with great force
Usage: informal

Examples

• The construction crew used a jackhammer to break up the old sidewalk.
• The noise from the jackhammer could be heard throughout the neighborhood.
• Workers jackhammered the concrete foundation all morning.
• He jackhammered through the asphalt to reach the water pipe below.
• The boxer jackhammered his opponent with a series of quick punches.
• They had to jackhammer the frozen ground before they could dig.