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
Carol Besler, Robb Report, 3 Oct. 2025
Those who have observed Jayden Daniels’ arc, for example, swear his use of virtual-reality systems — mimicking game speed without the pressure of results — help his split-second decision-making.
—Alec Lewis, New York Times, 30 Sep. 2025
Literary Hub, 29 Sep. 2025
When addressing the costly turnovers, like the fourth-quarter interception that put the Bills in position to seal the 31-21 win, Tagovailoa points out those decisions are made in split seconds.
—Omar Kelly, Miami Herald, 26 Sep. 2025
See All Example Sentences for split-second
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Adjective
Released on the occasion of the Singapore Grand Prix, the choice of the HMC 804 automatic flying tourbillon movement, with its double hairspring designed to improve precision and resilience, is a nod to the split-second accuracy demanded in Formula One.
—Carol Besler, Robb Report, 3 Oct. 2025
Those who have observed Jayden Daniels’ arc, for example, swear his use of virtual-reality systems — mimicking game speed without the pressure of results — help his split-second decision-making.
—Alec Lewis, New York Times, 30 Sep. 2025
Noun
Most critically, a photograph could capture only a split second of time.
—Literary Hub, 29 Sep. 2025
When addressing the costly turnovers, like the fourth-quarter interception that put the Bills in position to seal the 31-21 win, Tagovailoa points out those decisions are made in split seconds.
—Omar Kelly, Miami Herald, 26 Sep. 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 6 Oct. 2025.
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