dead is a common English word with multiple meanings:
1. No longer alive
2. Completely exhausted
3. No longer in use or functioning
4. (of a place) without activity or excitement
5. (informal) very or completely
6. (of a ball in sports) out of play
7. (of sound) without resonance
dead这个英文词儿可有意思了，咱慢慢唠唠：
1. 最常用的意思就是"死了"，比如："My phone is dead"就是"我手机没电了"，跟死机差不多
2. 形容人累成狗的时候可以说"I'm dead"，翻译成"累死我了"、"瘫了"都行
3. 说东西坏了不工作了，比如"The battery is dead"就是"电池废了"
4. 形容地方冷清，比如"This town is dead on weekends"可以翻译成"这地儿周末跟鬼城似的"
5. 网络用语里经常说"dead serious"就是"贼认真"，"dead tired"就是"累成狗"
6. 体育比赛里说"The ball is dead"就是"球出界了"、"比赛暂停"的意思
7. 形容声音闷闷的可以说"dead sound"，翻译成"声音发闷"
补充点好玩的：现在年轻人爱说"笑死了"，英文就是"I'm dead"，特别形象吧？还有"社死"这种网络热词，跟dead也有关系，就是"socially dead"的缩写。