Gauge/ɡeɪdʒ/ Definition 1 of 4Pro Tip 1/3Practical Tool Used for precise measurements in technical or mechanical contexts, often for safety. Use the gauge to check the boiler's pressure level. Pro Tip 2/3Instrument Reading Gauges often provide a visual representation, like a dial, to read measurements quickly. The fuel gauge shows that the tank is nearly empty. Pro Tip 3/3Context Specific The type of gauge depends on what's being measured: pressure, rainfall, fuel, etc. Install a rain gauge in your garden to measure precipitation.