Definition

Noun An extremely brief period of time; a moment so short it is almost instantaneous.

Usage

The term "split second" is used to emphasize the extreme brevity or immediacy of an event, decision, or reaction. It often describes a moment that is too short to measure precisely or to think about consciously.

Examples

• The driver had only a split second to react and avoid the collision.
• For a split second, I thought I saw a familiar face in the crowd.
• The difference between winning and losing was a matter of split seconds.

Advanced Usage

• "In a split second": This common adverbial phrase means "instantaneously" or "almost immediately."
  • The entire situation changed in a split second.
• "A split-second decision": A decision made almost instantly, without time for deliberation.
  • The firefighter made a split-second decision to enter the burning building.

Variants and Related Words

• Split-second (adjective): Used attributively to describe something that happens or is required in an extremely short time.
  • The mission required split-second timing.

Synonyms

• Instant
• Flash
• Blink of an eye
• Heartbeat
• Moment
• Twinkling

Related Idioms

• In the blink of an eye: Happening extremely quickly.
• In a heartbeat: Without any hesitation; instantly.

Noun

1. a very short time (as the time it takes the eye to blink or the heart to beat)
   • if I had the chance I'd do it in a flash