Generator may refer to:
Signal generator, electronic devices that generate repeating or non-repeating electronic signals
Electric generator, a device that converts mechanical energy to electrical energy
Generator (circuit theory), an element in an abstract circuit providing a source of electricity
Engine-generator, an electric generator with its own engine
Wearable generator, a hypothetical generator that can be worn on the human body
Gas generator a device, often similar to a solid rocket or a liquid rocket that burns to produce large volumes of relatively cool gas.
Motor–generator, a device for converting electrical power to another form