- One who engages in any contest; esp. one who in ancient
times contended in single combat in behalf of another's honor or
rights; or one who acts or speaks in behalf of a person or a cause; a
defender; an advocate; a hero. - One who by defeating all rivals, has obtained an
acknowledged supremacy in any branch of athetics or game of skill, and
is ready to contend with any rival; as, the champion of England.