Question

What do you mean by switch? Explain.

Answer 1

switch is a device for making and breaking a circuit.

hope that helps

Answer 2

switch is a piece of a physical circuitry component that governs the signal flow. Having a switch or toggle switch  allows a connection to be opened or closed. When opened, the switch allows a signal or power to flow through the connection. When closed, the switch stops the flow and breaks the circuit connection.