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Meaning of “killer” in the English Dictionary

"killer" in British English

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killernoun

uk   /ˈkɪl.ər/ us   /ˈkɪl.ɚ/
  • killer noun (DEATH)

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

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killer
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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