1. An extremely powerful nation: A superpower, like the U.S.A. or Russia, is capable of influencing international events and the acts and policies of less powerful countries.
2. Power greater in scope or magnitude than that which is considered natural or has previously existed: Perhaps the coronavirus COVID-19 can be considered to be a superpower in that millions of people died because of it all over the world.
3. Power: A superpower can be a mechanical or electric power, on an extremely large scale secured by the linking together of a number of separate power systems, with a view to more efficient and economical generation and distribution.