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
Literary Hub, 26 May 2026
As the killers approach, Mo sends Rainwater and Tate upstairs for safety and tucks his long braids away.
—Bryan Alexander, USA Today, 25 May 2026
Then there’s the killer storytelling instincts.
—Chelsea Tobin, Forbes.com, 25 May 2026
Artturi Lehkonen, a longtime playoff killer, has no points and just five shots on goal in this series.
—Corey Masisak, Denver Post, 25 May 2026
See All Example Sentences for killer
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Noun
Men like the Paxton killers envisioned an American landscape stripped of its Indigenous inhabitants, where settlers could live on their land with their wives and children in peace and prosperity.
—Literary Hub, 26 May 2026
As the killers approach, Mo sends Rainwater and Tate upstairs for safety and tucks his long braids away.
—Bryan Alexander, USA Today, 25 May 2026
Then there’s the killer storytelling instincts.
—Chelsea Tobin, Forbes.com, 25 May 2026
Artturi Lehkonen, a longtime playoff killer, has no points and just five shots on goal in this series.
—Corey Masisak, Denver Post, 25 May 2026
See All Example Sentences for killer
Cite this Entry
“Killer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer. Accessed 26 May. 2026.
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