of breech-a whipping on the breech, or the act of whipping on the breech.-that part of a harness which passes round the breech of a horse, enabling him to hold back a vehicle.-a strong rope rove through the cascabel of a cannon and secured to ringbolts in the ship's side, to limit the recoil of the gun when it is discharged.-the sheet iron casing at the end of boilers to convey the smoke from the flues to the smokestack.