n. A short thick piece, as of wood.n. A person or a beast that is small, but thick-set and strong: as, a chunk of a boy; a chunk of a horse.n. A game formerly much played by certain tribes of North American Indians, consisting in rolling a disk of stone along a prepared course, and immediately afterward throwing a stick so as to make it lie as near the stone as possible when the two come to rest. The grounds used for this amusement are known as chunk-yards.n. Specifically, a range-bred horse of the western United States, suitable for draft purposes, standing 15 hands or over, and weighing from 1,100 to 1,400 pounds.In lumbering, to clear (ground) with an engine or horses of obstructions which cannot be removed by hand.