Definition of sprag in English:


Syllabification: sprag
Pronunciation: /sprag


  • 1A simple brake on a vehicle, especially a stout stick or bar inserted between the spokes of a wheel to check its motion.
  • 1.1A one-way clutch that keeps a vehicle from rolling backwards.
  • 2 Mining A prop used to support a roof, wall, or seam.


mid 19th cent: of unknown origin.

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a slit made by cutting with a saw