someone who wins a game, competition, or election

There'll be a prize for the winner. 获胜者将会得到奖品。

The winner of this match will play Aston Villa in the semifinals. 本场比赛的胜者将与阿斯顿维拉队在半决赛相遇。

And to find out who are the lucky winners of our competition, Samantha is going to draw some names out of the bag. 看看谁是我们竞赛中幸运的获胜者，萨曼莎将从袋子中抽出一些名字。

in sport, a goal or point that causes a player or team to win a game

Neil Eaves scored the winner in the last minute of the match. 尼尔‧伊夫斯在比赛的最后时刻得到了致胜的一分。

something that is extremely successful and popular

That lemon tart was a winner, wasn't it? 那个柠檬馅饼非常受欢迎，不是吗？

UK I think they're onto a winner with this latest product (= it will succeed). 我认为他们这个新产品会获得极大的成功。