killer Meaning in the Cambridge English Dictionary

Meaning of “killer” in the English Dictionary

"killer" in British English

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uk   /ˈkɪl.ər/  us   //

killer noun (DEATH)

B1 [C] someone who ​kills another ​person: Police are still ​hoping to ​find the ​dead woman's killer. [C] something that ​killspeople, ​especially a ​disease or other ​illness: Cancer and ​heartdisease are the UK's ​biggest killers. [C] something that ​destroys something: This ​chemical is ​found in most ​weedkillers.
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killer noun (EFFORT)

[S] informal something that is very ​difficult: The last ​question was a ​real killer.

killer noun (AMUSEMENT)

[C] US and Australian English informal a very ​entertaining or ​skilfulperson, ​story, or ​performance: Dizzy was a real killer on the ​trumpet.
adjective [before noun] uk   us  
a killer ​disease killer ​bees
(Definition of killer from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"killer" in American English

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killernoun [C]

 us   /ˈkɪl·ər/
someone or something that ​causes someone or something to ​die: The ​police haven’t ​found the killer ​yet. Heart ​disease is a killer (= ​cause of ​death). infml If something is ​described as a killer, it is very ​difficult: The ​test was a ​real killer. infml A killer is also someone or something that is very ​entertaining or ​skilled: Dizzy was a killer on the ​trumpet.
(Definition of killer from the Cambridge Academic Content Dictionary © Cambridge University Press)
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“killer” in American English

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