1. an instrument for measuring electric potential difference or voltage

Examples

• The electrician used a voltmeter to check the outlet.
• Connect the voltmeter across the battery terminals.
• The voltmeter reading showed 12 volts.
• Students learned to use a digital voltmeter in physics class.
• The technician’s voltmeter indicated a voltage drop in the circuit.
• Make sure the voltmeter is set to the correct range before testing.