Answer: superpower

AnswerCrossword Clue
SUPERPOWERThe United States, e.g.
SUPERPOWERX-ray vision, e.g.
SUPERPOWERInfluential nation
SUPERPOWERU.S.S.R. or U.S.A.
SUPERPOWERDominant state
superpowera great power
superpowerA very powerful and influential nation (used esp. with reference to the US and the former Soviet Union when these were perceived as the two most powerful nations in the world)
superpowerA dominant or preeminent individual or organization, esp. in a particular field