See ‘Meaning & use’ for definitions, usage, and quotation evidence. tr. thrashed , thrash·ing , thrash·es v. b. Definition of thrash verb in Oxford Advanced Learner's Dictionary. Thrash generally refers to a swift and violent movement, typically from side to side as a form of protest or struggle. "You stole it. to defeat thoroughly:[~ + object] Our team was thrashed by a score of 10-0. To strike thrash /θræʃ/ v. Apr 30, 2025 · In this guide, I’ll take you through everything you need to know about “thrash”—from its definitions and various uses to tips on mastering its application, common mistakes to avoid, and even playful exercises to test your understanding.