A sudden powerful forward or upward movement, especially by a crowd or by a natural force such as the waves or tide. The surge of the crowd pushed the barriers aside.
A sudden large increase, typically a temporary one. There was a surge in demand for electric cars last year.
A sudden marked increase in voltage or current in an electric circuit. The power surge damaged several electronic devices in the house.
A sudden strong feeling or emotion that quickly becomes more intense. She felt a surge of excitement as the plane took off.