• WordNet 3.6
    • n sprag a wooden prop used to support the roof of a mine
    • n sprag a chock or bar wedged under a wheel or between the spokes to prevent a vehicle from rolling down an incline
    • ***
Webster's Revised Unabridged Dictionary
    • n Sprag A billet of wood; a piece of timber used as a prop.
    • n Sprag sprăg (Zoöl) A young salmon.
    • a Sprag See Sprack a.
    • Sprag To check the motion of, as a carriage on a steep grade, by putting a sprag between the spokes of the wheel.
    • Sprag To prop or sustain with a sprag.
    • ***
Century Dictionary and Cyclopedia
    • n sprag A billet of wood.
    • n sprag Specifically In coal-mining: A short billet of wood used instead of a brake to lock the wheels of a car.
    • n sprag A short wooden prop used to support the coal during the operation of holing or undercutting; a punch-prop.
    • sprag To prop by a sprag; also, to stop, as a carriage on a steep grade, by putting a sprag in the spokes of the wheel.
    • n sprag A young salmon of the first year; a smolt.
    • n sprag A half-grown cod.
    • sprag A dialectal form of sprack.
    • n sprag A bar of steel attached by one end to a wagon or motor-car frame or body, while the other end (which is sharpened) can be let down at an angle with the ground, to prevent the vehicle from running backward down hills or grades. This device was first used on heavy wagons on hilly roads, so that the horses might be rested without the strain of the load. In motor-cars it guards against accident in case the brakes fail to hold or the tires slip. The sprag should be of such length as to be in no danger of being toppled over by a small lift of the body, and must be short enough to dig effectively even into a hard road surface. Also called locally a dart or a dagger.
    • ***
Chambers's Twentieth Century Dictionary
    • n Sprag sprag a piece of wood used to lock a wheel: a punch-prop in mining
    • v.t Sprag to prop, or to stop, by a sprag
    • n Sprag sprag (prov.) a young salmon.
    • ***


Webster's Revised Unabridged Dictionary
Cf. Icel. spraka, a small flounder


In literature:

But I'll put a sprag in your wheel afore you gang far.
"The Underworld" by James C. Welsh
Just run back to the stack and bring us one of them small sprags.
"The Copper Princess" by Kirk Munroe
Heald (gent), James Watson, William Maddison, Robert Boulton, John Spraggings, Francis Rockliffe, and Joshua Vickers (hatter).
"A History of Horncastle from the earliest period to the present time" by James Conway Walter
When the whole face is undercut and spragged, the shot-firer is summoned.
"The Boy With the U.S. Miners" by Francis Rolt-Wheeler
Next instant (to make quite sure) I jumped out, ran to the front, and lowered the sprag.
"The Lightning Conductor" by C. N. Williamson
The car was pushed up to the end of the track and its wheels 'spragged' by two blocks of coal.
"Atlantic Narratives" by Mary Antin
Sprag bracket Chape de bequille.
"English-French and French-English dictionary of the motor car, cycle, and boat" by Frederick Lucas

In poetry:

'E 'ad spragged me before for the loan of a quid.
But I told 'im straight out I was broke.
Still 'e would 'ang around me, wotever I did.
'E's a regiler obstinit bloke.
"Fiduciary Friendship" by C J Dennis

In news:

Cape Breton 's Sprag Session plays at Irish Fest this weekend.
Patents, PCE Sprags & Formchrome.
The Art of Sprag Design.
Autorotation is a Sprag Thing.