champion

An ongoing winner in a game or contest.

The defending champion is expected to defeat his challenger.

Curry, a four-time NBA champion with the Warriors, played for the Wildcats for three seasons between 2006 and 2009, where he was twice named conference player of the year.

Someone 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.

Someone who fights for a cause or status.

Emmeline Pankhurst was a champion of women's suffrage.

Specific outcomes from this policy included the appointment of a Digital Champion to drive forward the efforts to get more of the excluded to be included.

Someone who fights on another's behalf.

champion of the poor

A particularly notable member of a plant species, such as one of great size.

Pictured above is an actual photograph of a Regal Lily that famed all over the world. It's a champion plant—because in one season it produced a total of 89 blooms from one bulb, an amazing record among lilies.

There was a news clipping there with a photo of a magnificent American elm, which had just been named the champion for its species, the largest of its kind.

Acting as a champion; having defeated all one's competitors.

a champion bodybuilder

Excellent; beyond compare.

Excellent; brilliant; superb; deserving of high praise.

"That rollercoaster was champion," laughed Vinny.

To promote, advocate, or act as a champion for (a cause, etc.).

While obviously championing the Bluebell [Railway], Beardmore is keen for the 'big railway' to consider utilising what preserved railways can provide.

To challenge.