somebody or something that shows marked superiority; specif the winner of a competitive event, usu the overall winner after a series of contests
a militant supporter of, or fighter for, a cause or person
an outspoken champion of civil rights
in former times, somebody who did battle on behalf of another, esp in a tournament
God will raise me up a champion — Sir Walter Scott
[Middle English via Old French from medieval Latin campion-, campio, of West Germanic origin]