1. an instrument that measures electrical power in watts
Usage: technical

Examples

• The electrician used a wattmeter to check the power consumption of the air conditioner.
• The wattmeter showed that the new LED bulbs used significantly less electricity.
• Engineers installed a digital wattmeter to monitor the factory’s energy usage.
• The wattmeter reading indicated the motor was drawing 500 watts of power.
• She connected the wattmeter between the outlet and the appliance to measure its power draw.
• The laboratory’s wattmeter could measure power consumption with high precision.