Me·ter n.
 1. One who, or that which, metes or measures. See Coal-meter.
 2. An instrument for measuring, and usually for recording automatically, the quantity measured.
 Dry meter, a gas meter having measuring chambers, with flexible walls, which expand and contract like bellows and measure the gas by filling and emptying.
 Wet meter, a gas meter in which the revolution of a chambered drum in water measures the gas passing through it.