1. One who stops, closes, shuts, or hinders; that which stops or obstructs; that which closes or fills a vent or hole in a vessel.
2. A short piece of rope having a knot at one or both ends, with a lanyard under the knot, used to secure something.
3. (Science: botany) A name to several trees of the genus Eugenia, found in Florida and the west Indies; as, the red stopper. See Eugenia. Ring stopper, a large ringbolt in a ship’s deck, to which the deck stoppers are hooked.