an obsolete rude reed instrument (ger. zinken), of the oboe family.-a brass instrument, with cupped mouthpiece, and furnished with valves or pistons, now used in bands, and, in place of the trumpet, in orchestras. see cornet-a-piston.-a certain organ stop or register.-a cap of paper twisted at the end, used by retailers to inclose small wares.-a troop of cavalry; -- so called from its being accompanied by a cornet player.-the standard of such a troop.-the lowest grade of commissioned officer in a british cavalry troop, who carried the standard. the office was abolished in 1871.-a headdress-a square cap anciently worn as a mark of certain professions.-a part of a woman's headdress, in the 16th century.-see coronet, 2.