Definitions
1.NounAn ongoing winner in a game or contest."The defending champion is expected to defeat his challenger."
2.NounSomeone who is chosen to represent a group of people in a contest."Barcelona is eligible to play in FIFA Club World Cup as the champion of Europe."
3.NounSomeone who fights for a cause or status."Emmeline Pankhurst was a champion of women's suffrage."
4.NounSomeone who fights on another's behalf."champion of the poor"
5.NounA particularly notable member of a plant species, such as one of great size.
6.AdjectiveActing as a champion; having defeated all one's competitors."a champion bodybuilder"
7.AdjectiveExcellent; beyond compare.
8.AdjectiveExcellent; brilliant; superb; deserving of high praise.""That rollercoaster was champion," laughed Vinny."
9.VerbTo promote, advocate, or act as a champion for (a cause, etc.).
10.VerbTo challenge.