Energy Internet integrates small-scale renewable energy systems, electric loads, storage devices, and electric vehicles for effective transaction of power backed by emerging technologies such as Internet of Things, vehicle-to-grid, and blockchain. In the next 20 years, almost three billion people will join the middle class, propelling global demand for more and better housing, televisions, cars, food, water, energy, and myriad other goods and services. But, with increasing strain on the planet's resources, meeting this demand could carry. Energy Internet, a futuristic evolution of electricity system, is conceptualized as an energy sharing network. Then, we propose a new universal definition of the EI by bringing together the various existing.