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
Joe Jackson, Outside Online, 14 Nov. 2024
Active listening isn’t just about sitting there while someone talks, waiting for your turn to jump in with a killer rebuttal, said Coleman.
—Andrea Kane, CNN, 5 Nov. 2024
Nicolas Cage and Maika Monroe’s serial killer thriller Longlegs is going for Oscar gold and other awards season accolades.
—Tim Lammers, Forbes, 5 Nov. 2024
The jokes just aren’t funny enough — though there is one killer line about Shehzada, which was one of Aaryan’s major flops — and the scares aren’t terrifying enough.
—Anupama Chopra, The Hollywood Reporter, 5 Nov. 2024
See all Example Sentences for killer 
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Noun
These heavy duty packing cubes come in at a killer price ($15 for the 5-liter and $20 for the 10-liter) and definitely delivered in terms of packability and durability.
—Joe Jackson, Outside Online, 14 Nov. 2024
Active listening isn’t just about sitting there while someone talks, waiting for your turn to jump in with a killer rebuttal, said Coleman.
—Andrea Kane, CNN, 5 Nov. 2024
Nicolas Cage and Maika Monroe’s serial killer thriller Longlegs is going for Oscar gold and other awards season accolades.
—Tim Lammers, Forbes, 5 Nov. 2024
The jokes just aren’t funny enough — though there is one killer line about Shehzada, which was one of Aaryan’s major flops — and the scares aren’t terrifying enough.
—Anupama Chopra, The Hollywood Reporter, 5 Nov. 2024
See all Example Sentences for killer
Dictionary Entries Near killer
Cite this Entry
“Killer.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/killer. Accessed 28 Nov. 2024.
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