champion

n. champ, first-place winner; supporter, one who fights for -

v. defend, stand up for, fight for; advocate, promote

adj. first, in fist place; excellent

A champion (identical to the French, from the late Latin campio) is one who has repeatedly come out first among contestants in challenges (especially the winner of a tournament or other competition) or other test, one who is outstandingly skilled in their field. Olympic Gold Medalists, for example, Lindsay Davenport or Jean Claude Killy are champions in this sense. The term can be applied to animals too, in particular racehorses, eg, Secretariat or Phar Lap.
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Noun
1. someone who has won first place in a competition
(synonym) champ, title-holder
(hypernym) rival, challenger, competitor, competition, contender
(hyponym) record-breaker, record-holder
2. someone who fights for a cause
(synonym) fighter, hero, paladin
(hypernym) defender, guardian, protector, shielder
(derivation) defend
3. a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library"
(synonym) supporter, protagonist, admirer, booster, friend
(hypernym) advocate, advocator, proponent, exponent
(hyponym) anglophile, anglophil
(derivation) defend
4. someone who is dazzlingly skilled in any field
(synonym) ace, adept, sensation, maven, mavin, virtuoso, genius, hotshot, star, superstar, whiz, whizz, wizard, wiz
(hypernym) expert
(hyponym) track star
Verb
1. protect or fight for as a champion
(synonym) defend
(hypernym) back, endorse, indorse, plump for, plunk for, support
(derivation) supporter, protagonist, admirer, booster, friend
Adjective
1. holding first place in a contest; "a champion show dog"; "a prizewinning wine"
(synonym) prizewinning
(similar) best

n. champion, champ, one who is the best in his field, one who wins first place

adj. champion

n. champion; defender; expert (Informal)