Gauge
A black circle with the letter E, representing empty, printed on the left and the letter F, representing full, printed on the right, and a red arrow pointing toward the E

The fuel gauge in this drawing shows that the tank is almost empty. Image Credit: NASA

      an instrument for measuring something



Sentences:
The space shuttle has gauges that measure things like temperature and speed.

A gauge in the car shows the driver how much gas is in the tank.