1. a device or tool that holds or fastens something firmly in place
Usage: common in carpentry, metalworking, and engineering
2. a person or thing that clamps
Usage: less common than the tool sense

Examples

• The carpenter used a clamper to hold the wood pieces together while the glue dried.
• A bar clamper is essential for any woodworking shop.
• She adjusted the clamper to secure the metal plate in the vise.
• The clamper kept the two boards aligned during assembly.
• He tightened the clamper until the workpiece was completely immobilized.