split-sec·ond
ˈsplit-ˈse-kənd 
1
: occurring in a split second
a split-second decision
2
: extremely precise
split-second timing
Examples of split-second in a Sentence
Adjective
a day trader who is used to making split-second decisions
Noun
In a split second, it was all over.
a devastating accident can cause everything in your life to change in a split second
Recent Examples on the Web
Jijo Malayil, Interesting Engineering, 2 Jan. 2026
So on October 24, when a product on Brown’s head left a mark on his New York Knicks player OG Anunoby’s jersey, the split-second in time went viral.
—Jackie Fields, PEOPLE, 21 Dec. 2025
David Fear, Rolling Stone, 29 Dec. 2025
That makes a fake alert feel real for a split second.
—Kurt Knutsson, FOXNews.com, 22 Dec. 2025
See All Example Sentences for split-second
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Adjective
The demo goes far beyond a visual stunt, showing the robot managing real impacts, balance shifts, and split-second decisions in an uncontrolled setting.
—Jijo Malayil, Interesting Engineering, 2 Jan. 2026
So on October 24, when a product on Brown’s head left a mark on his New York Knicks player OG Anunoby’s jersey, the split-second in time went viral.
—Jackie Fields, PEOPLE, 21 Dec. 2025
Noun
Feig seems lost in pleasantly tipsy thought for a split second.
—David Fear, Rolling Stone, 29 Dec. 2025
That makes a fake alert feel real for a split second.
—Kurt Knutsson, FOXNews.com, 22 Dec. 2025
See All Example Sentences for split-second
Cite this Entry
“Split-second.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/split-second. Accessed 7 Jan. 2026.
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