Here are all the possible meanings and translations of the word Generator. Princeton's WordNet(0.00 / 0 votes)Rate this definition: generator(noun) an apparatus that produces a vapor or gas. generator(noun) engine that converts mechanical energy into electrical energy by electromagnetic induction. generator, source, author(noun) someone who originates or causes or initiates something. he was the generator of several complaints. generator(noun) an electronic device for producing a signal voltage.