split-second decision

noun

: a decision that must be made in an instant
a split-second decision to jump on the already moving train

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split second
split-second decision
split-second watch
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Cite this Entry

“Split-second decision.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/split-second%20decision. Accessed 5 Jul. 2026.

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