der Gewinner
winner
A person, team, or organization that wins a competition, game, or fight.
Der Gewinner des Hauptpreises wurde aus tausenden Einsendungen gezogen.
The winner of the grand prize was drawn from thousands of entries.

winner
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winner
A person, team, or organization that wins a competition, game, or fight.
Der Gewinner des Hauptpreises wurde aus tausenden Einsendungen gezogen.
The winner of the grand prize was drawn from thousands of entries.

'Gewinner' (winner) is derived directly from the verb 'gewinnen' (to win). The ending '-er' is a typical German way to indicate a male person who performs this action.
Wer gewinnt das Spiel, ist der Gewinner.
Whoever wins the game is the winner.
To say what someone is the winner of, German usually uses the genitive. This is typical of formal or written language.
Der Gewinner des Wettbewerbs erhält eine Reise nach Berlin.
The winner of the competition receives a trip to Berlin.
In economic or political discussions, 'Gewinner' (winner/beneficiary) often refers to a person or group that benefits from a development without having taken part in a direct competition.
Die Gewinner der Krise waren Online-Händler.
The beneficiaries of the crisis were online retailers.
master / champion
'der Meister' and 'der Gewinner' can both have to do with winning. In sports, 'Meister' usually means the winner of a championship, so often of a larger series of games or a season. 'Gewinner' is more general and fits many situations: a game, a prize, a competition, or even someone who benefits from a situation. The words can be confused because a Meister is also a Gewinner. But 'Gewinner' only says that someone has won or benefited; 'Meister' says more specifically that it is about a championship.

Der Gewinner der Verlosung bekommt zwei Karten für das Konzert.
The winner of the raffle gets two tickets to the concert.
Der Verein ist nach einer starken Saison verdient Meister geworden.
After a strong season, the club deservedly became champion.