- A pawl, click, or detent, for holding or propelling a ratchet wheel, or ratch, etc.
- A mechanism composed of a ratchet wheel, or ratch, and pawl.
- A wrench, implementing a ratchet mechanism, usually used with a set of sockets
- (transitive) To cause to become incremented or decremented.
- (intransitive) To increment or decrement.
- It's time to ratchet up the intensity level here.
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