the act of somebody/something being completely destroyed 滅: 某人/某物的行爲被完全摧毀the annihilation of the whole human race 全人類的毀滅
the complete defeat of somebody/something 殲滅: 某人/某物的徹底失敗The Brazilian needed just 82 minutes to complete the annihilation of his opponent. 巴西人只需要82分鐘就完成了對對手的殲滅。