superpower

super- +‎ power

superpower (countable and uncountable, plural superpowers)

1. (uncountable) Excessive or superior power.
2. (countable) A sovereign state with dominant status on the globe and a very advanced military, especially the Soviet Union or United States.
   • 1999, David Held, Global Transformations: Politics, Economics and Culture (page 97)

     The year 1945 marked the end of Europe's global hegemony and confirmed the US and the Soviet Union as global superpowers.

3. (countable) A fictional extraordinary physical or mental ability, especially possessed by a superhero or supervillain.
4. (obsolete, uncountable) Electricity generated in a large plant that is tied into a regional network, on a larger scale than was common in the early years of commercial electricity production.
5. (mathematics) A tetration (also known as a power tower and the inverse of a superlogarithm).