Definition of tachometer in English:
An instrument which measures the working speed of an engine (especially in a road vehicle), typically in revolutions per minute.
- Drivers watch their tachometers, which monitor RPMs, to get an idea of how fast they are going.
- I noted his tachometer, radar detector and exhaust pipe.
- The built-in tachometers and rpm-based automatic shifters that are incorporated into some delay boxes/devices may not be used for any purpose.
Definition of tachometer in:
- US English dictionary