adjective
superlative form of 'winning', indicating the most successful or having the most wins
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She is the winningest athlete in the history of the sport, with the most championship titles to her name.
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He's the winningest player on our team, always coming out on top in every game.
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That team is the winningest bunch of players I've ever seen, they dominate every match they play.
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Her winningest smile could light up the room and make everyone feel happy.