An electrician is a person whose job involves fixing or installing electrical wiring systems. If you keep blowing fuses in your kitchen, you may need to hire an electrician to fix your house's wiring.
While electricians also work on airplanes, ships, and various kinds of machines, most electricians do their job in houses and buildings that are wired for electricity to run lights, appliances, computers, and other gadgets. To work as an electrician, you need to be trained and licensed, which is especially important because of how dangerous electricity can be. In the 18th century, electricians were "scientists concerned with electricity," but by the late 1800s they were "electrical technicians."