<p><strong>Noun</strong></p><ul><li>a person who has defeated all opponents in a competition or series of competitions, so as to hold first place: the heavyweight boxing champion.</li><li>anything that takes first place in competition: the champion of a cattle show.</li><li>an animal that has won a certain number of points in officially recognized shows: This dog is a champion.</li><li>a person who fights for or defends any person or cause: a champion of the oppressed.</li><li>a fighter or warrior.</li></ul><p><strong>Verb</strong></p><ul><li>to act as champion of; defend; support: to champion a cause.</li></ul><p><strong>Adjective</strong></p><ul><li>first among all contestants or competitors.</li><li>Informal. first-rate.</li></ul>