2. a person who has defeated all opponents in a competition or series of competitions, so as to hold first place: the heavyweight boxing champion.
3. to overwhelm with surprise or sudden wonder; astonish greatly
4. not excited; calm; composed; under control: to remain cool in the face of disaster.
5.a guiding or directing head, as of an army, movement, or political group.
B. characterized by great facility; highly skilled or clever: cool maneuvers on the parallel bars.
—Synonyms winner, victor. defender, protector. maintain, fight for, advocate. collected, self-possessed, unruffled
EXAMPLES : One that wins first place or first prize in a competition.
One that is clearly superior or has the attributes of a winner: a champion at teaching.
An ardent defender or supporter of a cause or another person: a champion of the homeless.
One who fights; a warrior.
You are a true chillphill of the competition