Definition, Meaning & Synonyms

tachometer

Noun

/tæˈkɒmɪtər/

Definition

An instrument for measuring the rotational speed of a shaft or disk.

Examples

The car’s tachometer showed that the engine was running at 3,000 RPM.
When the tachometer needle starts to move into the red zone, it means the engine is over-revving.
The pilot carefully monitored the tachometer during the flight to ensure optimal engine performance.

Meaning

A tachometer indicates how fast something is rotating, usually measured in revolutions per minute (RPM). It is commonly used in vehicles to measure engine speed.