From Longman Dictionary of Contemporary Englishconvincing victory/winconvincing victory/winWINan occasion when a person or team wins a game by a lot of points → convincing
Examples from the Corpus
convincing victory/win• Lets hope for a convincing win.• Then, leading 12-4, Hall took three points running for a convincing victory.• Let's start preparing for a convincing win against Sheffield Utd.• Pasok by-election victory Pasok secured a convincing victory in a by-election in the Athens B district on April 5.• After a convincing win in game 1 Kasparov fell prey to overconfidence, losing games 4 and 5.• If not a thoroughly convincing victory it further establishes Mason in the heavyweight division and his career will now take definite shape.• It is the convincing win the Ducks needed, and Jody is more relieved than happy. 