champion
//ˈtʃæm.pi.ən//
Noun
championSingular
championsPlural
1
A person who has defeated or surpassed all rivals in a competition, especially in sports
She became the world champion in tennis.
2
A person who fights or argues for a cause or on behalf of someone else
She has been a champion of human rights throughout her career.
3
A warrior or fighter, especially one who fought in single combat on behalf of another
The knight served as the king's champion in the duel.
Verb
championPresent tense
championedPast tense
championedPast participle
championingPresent participle
championsThird-person singular
1
To support, defend, or fight for a person, cause, or principle
She has championed the rights of workers throughout her career.
Adjective
championCanonical form
1
Excellent or outstanding (informal British usage)
That's a champion idea!