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  1. Dictionary
    killer
    /ˈkɪlə/

    noun

    • 1. a person or thing that kills: "there's a killer on the loose" Similar murdererslaughtererdestroyerliquidator
    • 2. an extremely difficult or unpleasant thing: informal "the shift system was a killer"

    adjective

    • 1. denoting a person or thing that kills: "a killer virus"
    • 2. extremely difficult or unpleasant: informal "I woke up with a killer hangover"

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    More definitions, origin and scrabble points

  2. dictionary.cambridge.org › dictionary › englishKILLER | English meaning - Cambridge Dictionary

    KILLER definition: 1. someone who kills another person: 2. something that kills people, especially a disease or other…. Learn more.

  3. www.merriam-webster.com › dictionary › killerKiller Definition & Meaning - Merriam-Webster

    : one that has a forceful, violent, or striking impact. b. : one that is extremely difficult to deal with. killer. 2 of 2. adjective. 1. : strikingly impressive or effective. a killer smile. a killer résumé. 2. : extremely difficult to deal with. a killer fastball. also : causing death or devastation. a killer tornado. Synonyms. Noun. bear. beast.

  4. www.dictionary.com › browse › killerKILLER Definition & Meaning | Dictionary.com

    A person or thing that ends someone’s life is a killer. In terms of a person, killer is often used interchangeably with murderer. However, killer can refer to someone who killed another person by accident, while murderer is not used in that sense. Real-life examples: John Wilkes Booth was Abraham Lincoln’s killer. Jack the Ripper was an ...

  5. www.thefreedictionary.com › killerKiller - definition of killer by The Free Dictionary

    adj. 1. Causing death or destruction: killer floods. 2. Slang. a. Having impressive or effective power or impact; formidable: had a killer smile; made killer profits. b. Extremely useful or indispensible: a killer web application. American Heritage® Dictionary of the English Language, Fifth Edition.

  6. www.collinsdictionary.com › dictionary › englishKILLER definition and meaning | Collins English Dictionary

    A killer is a person who has killed someone, or who intends to kill someone. The police are searching for his killers. He's a psychopath, a killer. Synonyms: murderer, slaughterer, slayer, hitman or woman [slang] More Synonyms of killer. 2. countable noun. You can refer to something that causes death or is likely to cause death as a killer.

  7. www.oxfordlearnersdictionaries.com › definition › englishkiller noun - Definition, pictures, pronunciation and usage notes...

    noun. /ˈkɪlə (r)/ /ˈkɪlər/ a person, an animal or a thing that kills. Police are hunting his killer. Heart disease is the biggest killer in Scotland. an electric insect killer. see also giant-killer, killer instinct, ladykiller, serial killer. Extra Examples. Topics Crime and punishment b1. Oxford Collocations Dictionary. Definitions on the go.

  8. www.vocabulary.com › dictionary › killerKiller - Definition, Meaning & Synonyms | Vocabulary.com

    a criminal who commits homicide (who performs the unlawful premeditated killing of another human being)

  9. dictionary.cambridge.org › us › dictionaryKILLER | definition in the Cambridge Learner’s Dictionary

    KILLER meaning: someone who kills, or a disease, substance, or animal that kills: . Learn more.

  10. www.collinsdictionary.com › us › dictionaryKILLER - All you need to know about it | Collins English...

    Definitions of 'killer' 1. A killer is a person who has killed someone, or who intends to kill someone. [...] 2. You can refer to something that causes death or is likely to cause death as a killer. [...] More. Synonyms of 'killer' • murderer, slaughterer, slayer, hitman or woman (slang) [...]

  11. www.ldoceonline.com › dictionary › killerkiller | meaning of killer in Longman Dictionary of Contemporary...

    killer meaning, definition, what is killer: a person, animal, or thing that kills: Learn more.