Split Second Definition

noun
An instant; a flash.
American Heritage
A fraction of a second.
Webster's New World
The nick of time; a brief moment.
Luckily, no other cars were nearby, and the fire engine's driver was able to swerve into another lane a split second before striking the SUV, Baker said.
Wiktionary

Other Word Forms of Split Second

Noun

Singular:
split second
Plural:
split seconds

Origin of Split Second

  • Short for split second hands a stopwatch with two second hands, one beneath the other, one of which may be stopped independently of the other

    From American Heritage Dictionary of the English Language, 5th Edition

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