white flag
noun [ C ] uk/ˌwaɪt ˈflæɡ/ us/ˌwaɪt ˈflæɡ/
（表示投降或无意进攻的）白旗
a flag that is waved to show that you accept defeat or do not intend to attack
The soldiers laid down their guns and walked towards the enemy camp, carrying a white flag. 士兵们放下枪支，举着白旗向敌方营地走去。