1. using valves, transistors, or silicon chips: relating to devices, systems, or circuits that employ components such as vacuum tubes, integrated circuits, or transistors in their design an electronic sensor
2. by computer: relating to, using, or accessed through a computer or computer network, e.g. the Internet electronic banking
3. physics of electrons: relating to electrons the electronic spectrum
4. physics of controlled flow of electrons: relating to, or produced or operated by, the controlled flow of electrons through a semiconductor, a gas, or free space
