Generator/ˈdʒenəreɪtər/ Definition 1 of 4Pro Tip 1/3Power Source The term often refers to equipment providing electricity or mechanical power. During the outage, the generator kept the lights on. Pro Tip 2/3Types Matter Different types of generators are used for varying needs like electric, gas, or diesel. The campsite requires a gas generator for energy. Pro Tip 3/3Portability Generators can be stationary for buildings or portable for moveable use. We have a portable generator for our road trips.