noun
- the negatively charged electrode in an electrical device through which current leaves
Usage: electronics; physics
Examples
- The cathode ray tube was essential in old television sets.
- Electrons flow from the cathode to the anode in the circuit.
- The battery’s cathode is marked with a minus sign.
- Scientists studied the cathode’s behavior in the vacuum tube.
- The cathode emitted a steady stream of electrons.
- Replace the cathode when the device stops working properly.