What does "split second" mean?

Alternative form of split-second.

What is a synonym for "split second"?

Common synonyms include: blink, blink of an eye, blinks, breath, breathing, coup.

noun

noun ·Rare ·Advanced level

Noun

1
Alternative form of split-second. alt-of, alternative
"It's very dangerous, though, when a man thinks for a split second that he understands death."
2
a very short time (as the time it takes the eye to blink or the heart to beat) wordnet

"It's very dangerous, though, when a man thinks for a split second that he understands death."