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killer

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1killer/ˈkɪlɚ/noun
pluralkillers
1killer
/ˈkɪlɚ/
noun
pluralkillers
Learner's definition of KILLER  
[count]
: a person or thing that kills someone or something
informal : something that is very difficult
2killer/ˈkɪlɚ/adjective
2killer
/ˈkɪlɚ/
adjective
Learner's definition of KILLER  
always used before a nounchiefly US
: causing death or destruction
informal : very impressive or appealing
informal : very difficult
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