优胜劣败 yōushènglièbài survival of the fittest Origin Definitions Defs Strokes Stroke Words Sentences Sents 优胜 優勝 yōushèng winning superior in performance or results; achieving victory in a competition劣败 劣敗 lièbài to be defeated for the inferior or weak to be defeated or eliminated in a competition; often used as the opposite of 优胜 yōushèng