Definition of stopper

• n. - One who stops, closes, shuts, or hinders; that which stops or obstructs; that which closes or fills a vent or hole in a vessel.
• n. - A short piece of rope having a knot at one or both ends, with a lanyard under the knot, -- used to secure something.
• n. - A name to several trees of the genus Eugenia, found in Florida and the West Indies; as, the red stopper. See Eugenia.
• v. t. - To close or secure with a stopper.