1. a chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline
2. a wooden prop used to support the roof of a mine
Definition categories: man–made, prop
1. (transitive) To check the motion of, as a carriage on a steep slope, by putting a sprag between the spokes of the wheel.
2. (transitive) To prop or sustain with a sprag.