Definition of sprag in US English:

sprag

noun

  • 1A simple brake on a vehicle, especially a stout stick or bar inserted between the spokes of a wheel to check its motion.

    1. 1.1 A one-way clutch that keeps a vehicle from rolling backwards.
  • 2A prop used to support a roof, wall, or seam.

    prop, beam, joist, batten, rod, post, pole, column, strut, stay, support, truss, reinforcement, buttress, shore, stanchion, bracket
    View synonyms

Origin

Mid 19th century: of unknown origin.

Pronunciation

sprag

/spræɡ//spraɡ/