n. A small rounded stone.n. In jewelry, an agate. Scotch agates are commonly known as Scotch pebbles.n. A transparent and colorless rook-crystal used as a substitute for glass in spectacles, or a fine kind of glass so used.n. Pebble-leather.n. A large size of gunpowder; pebble-powder.n. One of several different pyralid, tortricid, and bombycid moths: an English collectors’ name.To assume a prominent grain, or a rough or ribbed appearance, as leather when treated by the process called pebbling.To prepare, as leather, so as to cause the grain to become prominent and to present a roughened or ribbed appearance. See pebbling.n. In Australia, a hard, obstinate person; a tough; also said of animals.