tach

A noun referring to a measuring instrument that indicates the speed of rotation, often used in vehicles or machinery.

• 🇫🇷Nom désignant un instrument de mesure qui indique la vitesse de rotation, souvent utilisé dans les véhicules ou les machines.

1. Tachometer B2 formal technical

   An instrument that measures the rotation speed of a shaft or disk, as in a motor or other machine.

   • The mechanic checked the tach to see if the engine was idling correctly.
   • The car's tachometer showed the engine was running at 3000 RPM.
   • He installed a digital tach on his motorcycle to monitor performance.

   🇫🇷Tachymètre

   Synonymes: tachometer