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
Brian T. Allen, National Review, 22 Mar. 2025
Entertainment gossip and news from Newsweek's network of contributors
A guy known for delivering killer monologues is joining the long list of suspects at the Arconia.
—Thomas G. Moukawsher, Newsweek, 22 Mar. 2025
Since hens can’t catch coccidia through mating, Buchholz believes their preference for toms with killer snoods isn’t related to avoiding parasites.
—Alice Jones Webb, Outdoor Life, 21 Mar. 2025
Security Camera Deals The Ring Stick Up Cam Pro is a killer security cam for both indoor and outdoor use.
—Shubham Yewale, PCMAG, 21 Mar. 2025
See All Example Sentences for killer
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Noun
Materials for all seasons at the world’s grandest art fair, plus Cleopatra and a killer ship model
The European Fine Art Fair in Maastricht in the Netherlands is the art extravaganza of the year.
—Brian T. Allen, National Review, 22 Mar. 2025
Entertainment gossip and news from Newsweek's network of contributors
A guy known for delivering killer monologues is joining the long list of suspects at the Arconia.
—Thomas G. Moukawsher, Newsweek, 22 Mar. 2025
Since hens can’t catch coccidia through mating, Buchholz believes their preference for toms with killer snoods isn’t related to avoiding parasites.
—Alice Jones Webb, Outdoor Life, 21 Mar. 2025
Security Camera Deals The Ring Stick Up Cam Pro is a killer security cam for both indoor and outdoor use.
—Shubham Yewale, PCMAG, 21 Mar. 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 5 Apr. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share