n. One who undertakes to defend any cause; especially, one who engages in combat or contention in behalf of another, or in any representative capacity: as, the champion of an army or of a party; a champion for the truth, or of innocence.n. More generally, a hero; a brave warrior.n. One who has demonstrated his superiority to all others in some matter decided by public, contest or competition, as prize-fighting, pedestrianism, rowing, plowing, etc.First among all competitors or contestants: as, a champion oarsman.Hence By extension, of the first rank or highest excellence in any respect; unexcelled.To maintain or support by contest or advocacy; act as champion for.See champian.n. An animal or a plant to which, or to its owner, the first prize has been awarded in any general competition, as at a horse-, cattle-, bench-, or other show, or which has taken a number of prizes.n. Some variety of vegetable, fruit, implement, or the like, for which the highest excellence is claimed.