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
Synonyms
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
Matt Grobar, Deadline, 27 June 2024
Sarah Michelle Gellar knows a thing or two about serial killers.
—Sydney Bucksbaum, EW.com, 27 June 2024
She’s mysteriously trailed by a P.I. (Kevin Bacon) and haunted by accumulating deaths around her, while the city is terrorized by real-life serial killer Richard Ramirez, known as the Night Stalker.
—Rich Juzwiak, TIME, 27 June 2024
The family of one of Jeffrey Dahmer's victims is taking aim at pop star Ariana Grande for her recent comment about her past interest in meeting the Milwaukee serial killer.
—Chris Foran, Journal Sentinel, 27 June 2024
See all Example Sentences for killer 
Noun
Upcoming projects include the Paramount+ serial killer drama Happy Face, A24’s adaptation of No. 1 true crime podcasts The Girlfriends, and comedy The Pradeeps of Pittsburgh for Amazon Freevee.
Semi-Formal is represented by UTA, Artists First, and Goodman, Genow, Schenkman.
—Matt Grobar, Deadline, 27 June 2024
Sarah Michelle Gellar knows a thing or two about serial killers.
—Sydney Bucksbaum, EW.com, 27 June 2024
She’s mysteriously trailed by a P.I. (Kevin Bacon) and haunted by accumulating deaths around her, while the city is terrorized by real-life serial killer Richard Ramirez, known as the Night Stalker.
—Rich Juzwiak, TIME, 27 June 2024
The family of one of Jeffrey Dahmer's victims is taking aim at pop star Ariana Grande for her recent comment about her past interest in meeting the Milwaukee serial killer.
—Chris Foran, Journal Sentinel, 27 June 2024
See all Example Sentences for killer
These examples are programmatically compiled from various online sources to illustrate current usage of the word 'killer.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback about these examples.
Dictionary Entries Near killer
Cite this Entry
“Killer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer. Accessed 15 Jul. 2024.
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