Killer | Mean of killer in English Dictionary

/ˈkɪlɚ/

• Noun
• a person or thing that kills someone or something
1. The police finally captured the killer. [=murderer]
2. Heart disease is the leading killer of both men and women.
3. The chemical is used as a weed killer.
• something that is very difficult
1. That exam was a (real) killer. = That sure was a killer of an exam.
• causing death or destruction
1. a killer tornado

• very impressive or appealing
1. She has a killer smile. [=a very attractive smile]
2. a killer résumé
• very difficult
1. a killer exam