1
: one that kills
2
3
a
: one that has a forceful, violent, or striking impact
b
: one that is extremely difficult to deal with
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
Examples of killer in a Sentence
Noun
Heart disease is the leading killer of both men and women.
The chemical is used as a weed killer.
Adjective
killer viruses that claimed millions of lives
a killer exercise program guaranteed to whip you into shape
Recent Examples on the Web
The California Independent Booksellers Alliance, Los Angeles Times, 4 June 2025
Fast forward about four decades to 2023, when the county Crime Lab, run by the DA’s office, was tasked with re-examining the available physical evidence from Peterson’s killing to look for any forensic traces of her killer.
—Robert Salonga, Mercury News, 3 June 2025
The film is controversial for how the killer is revealed during a moment of transgender panic that’s still jarring to watch.
—Erik Piepenburg, New York Times, 2 June 2025
If the price of the Pixel 10 were to rise, that would risk the flagship killer's space.
Pixel 10 And Pixel 10 Pro Driving Conversation
Unlike other Android manufacturers (perhaps excepting Samsung), Google has a totemic relationship with the consumers through the Pixel line-up.
—Ewan Spence, Forbes.com, 2 June 2025
See All Example Sentences for killer
Examples are automatically compiled from online sources to
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Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
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Noun
Holly Gibney is back on the case, this time facing both a serial killer and a stalker.
—The California Independent Booksellers Alliance, Los Angeles Times, 4 June 2025
Fast forward about four decades to 2023, when the county Crime Lab, run by the DA’s office, was tasked with re-examining the available physical evidence from Peterson’s killing to look for any forensic traces of her killer.
—Robert Salonga, Mercury News, 3 June 2025
The film is controversial for how the killer is revealed during a moment of transgender panic that’s still jarring to watch.
—Erik Piepenburg, New York Times, 2 June 2025
If the price of the Pixel 10 were to rise, that would risk the flagship killer's space.
Pixel 10 And Pixel 10 Pro Driving Conversation
Unlike other Android manufacturers (perhaps excepting Samsung), Google has a totemic relationship with the consumers through the Pixel line-up.
—Ewan Spence, Forbes.com, 2 June 2025
See All Example Sentences for killer
Cite this Entry
“Killer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer. Accessed 10 Jun. 2025.
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