Champion

a person who has defeated all opponents in a competition or series of competitions, so as to hold first place:
the heavyweight boxing champion.
anything that takes first place in competition:
the champion of a cattle show.
an animal that has won a certain number of points in officially recognized shows:
This dog is a champion.
a person who fights for or defends any person or cause:
a champion of the oppressed.
a fighter or warrior.
to act as champion of; defend; support:
to champion a cause.
Obsolete. to defy.
first among all contestants or competitors.
Informal. first-rate.
Gower [gou-er] /ˈgaʊ ər/ (Show IPA), 1921–80, U.S. choreographer.
noun

a person who has defeated all others in a competition: a chess champion
(as modifier): a champion team

a plant or animal that wins first place in a show, etc
(as modifier): a champion marrow

a person who defends a person or cause: champion of the underprivileged
(formerly) a warrior or knight who did battle for another, esp a king or queen, to defend their rights or honour
adjective
(Northern English, dialect) first rate; excellent
adverb
(Northern English, dialect) very well; excellently
verb (transitive)
to support; defend: we champion the cause of liberty
n.

early 13c., “doughty fighting man, valorous combatant,” also (c.1300) “one who fights on behalf of another or others,” from Old French champion “combatant, champion in single combat” (12c.), from Late Latin campionem (nominative campio) “gladiator, fighter, combatant in the field,” from Latin campus “field (of combat);” see campus. Had been borrowed earlier by Old English as cempa. Sports sense in reference to “first-place performer in some field” is recorded from 1730.
v.

“to fight for, defend, protect,” 1820 (Scott) in a literal sense, from champion (n.). Figurative use by 1830. Earlier it meant “to challenge” (c.1600). Related: Championed; championing.

(1 Sam. 17:4, 23), properly “the man between the two,” denoting the position of Goliath between the two camps. Single combats of this kind at the head of armies were common in ancient times. In ver. 51 this word is the rendering of a different Hebrew word, and properly denotes “a mighty man.”