- a roof prop used in a coal mine
- ☆ a device for preventing a vehicle from rolling backward on a grade
Origin: prob. from Scand, as inch(es) Danish sprag, twig from base of sprage, to crack, crackle: for Indo-European base see spark
Used by arrangement with John Wiley & Sons, Inc.
- a. A piece of wood or metal wedged beneath a wheel or between spokes to keep a vehicle from rolling.b. A pointed stake lowered at an angle into the ground from a vehicle to prevent movement.
- A prop to support a mine roof.
Origin: Perhaps of Scandinavian origin.