A clamp is a tool that's used to secure two things tightly together. When you repair a chair, it's best to use a clamp to hold the glued pieces together firmly.

Carpenters, woodworkers, and plumbers all use clamps when they want to hold things together while they wait for glue to dry or need their hands free. When you use this kind of device, you can also say you clamp something: "Clamp that board down for me before I turn the saw on." Clamp most likely shares a Germanic root with the word clam*klam-, "to press together."

Definitions of clamp
  1. noun
    a device (generally used by carpenters) that holds things firmly together
    synonyms: clinch
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    bench clamp
    a clamp used to hold work in place on a workbench
    a clamp in the shape of the letter C
    a clamp for holding pieces of wood together while they are glued
    pipe clamp, pipe vise
    a clamp for holding pipe that is to be cut or threaded
    clamp to prevent wooden rackets from warping when not in use
    type of:
    holding device
    a device for holding something
  2. verb
    fasten or fix with a clamp
    clamp the chair together until the glue has hardened”
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    type of:
    fasten, fix, secure
    cause to be firmly attached
  3. verb
    impose or inflict forcefully
    “The military government clamped a curfew onto the capital”
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    type of:
    bring down, impose, inflict, visit
    impose something unpleasant
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