Pronunciation: (sOO'pur-pou"ur),[key] —n. 1. an extremely powerful nation, esp. one capable of influencing international events and the acts and policies of less powerful nations.
2. power greater in scope or magnitude than that which is considered natural or has previously existed.
3. power, esp. 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.