definition of
champion

[1] #1 champion n. [champ, title-holder] someone who has won first place in a competition. wn

[2] #2 champion v. [defend] protect or fight for as a champion. wn

[3] #3 champion n. [fighter, hero, paladin] someone who fights for a cause. wn

[4] #4 champion s. [prizewinning] holding first place in a contest; "a champion show dog"; "a prizewinning wine". wn

[5] #5 champion n. [supporter, protagonist, admirer, booster, friend] a person who backs a politician or a team etc.; "all their supporters came out for the game"; "they are friends of the library". wn