champion
adjective
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holding first place in a contest“a champion show dog”prizewinning
noun
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someone who is dazzlingly skilled in any fieldadeptacegeniussensationstarwhizmavenmavinhotshotsuperstarwhizzwizardwiz
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someone who fights for a causefighterheropaladin
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someone who has won first place in a competitionchamp
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a person who backs a politician or a team etc.supporterboosterfriendadmirerprotagonist
verb
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to protect or fight for as a championdefend