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Longman Dictionary of Contemporary English
sea power
noun
EXAMPLES FROM CORPUS
▪ For Mahan sea power was critical, for Mackinder a particular land mass.
▪ In a sea power economy, vested interests are in open markets and free trade.
▪ The most difficult strategic question was whether sea power was any longer the foundation upon which the Three Pillars could continue to stand.
WordNet
sea power
  1. n. naval strength

  2. a nation that possesses formidable naval strength