A decisive or overwhelming victory; a big win or large profit (used for games, elections, gambling, business, etc.).
野球チームが昨日の試合で大勝ちして、ファンが大騒ぎした。
The baseball team had a big win in yesterday's game, and the fans went wild.
彼は株で大勝ちして、短期間でかなりの資産を築いた。
He made a killing in stocks and built up a substantial fortune in a short time.
その党は選挙で大勝ちし、議席を大幅に伸ばした。
The party won a landslide in the election and greatly increased its seats.