Electricity/ɪˌlekˈtrɪsəti/ Definition 1 of 3Pro Tip 1/3Power Source Used when referring to the source providing energy for electrical devices. Homes and businesses rely on electricity for lighting and appliances. Pro Tip 2/3Supply Interruption Refers to the loss of electrical power, often causing inconvenience. During the storm, electricity was out for several hours. Pro Tip 3/3Utility Cost Electricity is commonly paid for; 'electricity bill' refers to this expense. The electricity bill goes up in winter when we use more heating.