split-second

1 of 2

adjective

split-sec·​ond ˈsplit-ˈse-kənd How to pronounce split-second (audio)
1
: occurring in a split second
a split-second decision
2
: extremely precise
split-second timing

split second

2 of 2

noun

: a fractional part of a second : flash

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
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.
Adjective
The second play was sensational for the split-second decision that was required, as well as for the execution. Kevin Acee, San Diego Union-Tribune, 3 June 2025 Often spread out across the world, players rely on split-second timing to make shots or passes. Michael Ashley, Forbes.com, 3 June 2025
Noun
Then, in a split second, Haliburton decided to dribble backward to hoist a prayer and go for the win. James L. Edwards Iii, New York Times, 22 May 2025 The true star of the show here is the latest generation of the split seconds chronograph mechanism developed by Richard Mille and APLL (Audemars Piguet Le Locle). Blake Buettner, Robb Report, 21 Mar. 2025 See All Example Sentences for split-second

Word History

First Known Use

Adjective

1944, in the meaning defined at sense 1

Noun

1912, in the meaning defined above

Time Traveler
The first known use of split-second was in 1912

Browse Nearby Words

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Cite this Entry

“Split-second.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/split-second. Accessed 13 Jun. 2025.

Kids Definition

split second

1 of 2 noun
: a small fraction of a second : flash

split-second

2 of 2 adjective
1
: occurring in a split second
a split-second decision
2
: extremely precise
split-second timing
Last Updated: - Updated example sentences
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