noun A concrete margin along the edge of a road; a kerb .
noun A raised margin along the edge of something, such as a well or the eye of a dome, as a strengthening.
noun Something that checks or restrains; a restraint.
noun A riding or driving bit for a horse that has rein action which amplifies the pressure in the mouth by leverage advantage placing pressure on the poll by means of the crown piece of the bridle and chin groove by means of a curb chain.
noun A sidewalk, covered or partially enclosed, bordering the airport terminal road system with adjacent paved areas to permit vehicles to off-load or load passengers.
noun A swelling on the back part of the hind leg of a horse, just behind the lowest part of the hock joint, generally causing lameness.