A nation powerful enough to influence events throughout the world.(noun)
Gnu Collaboartive International Dictionary of English: licensed under The Code Project Open License (CPOL)
Use "major power" in a sentence
"The GPA should have had its own consulting herpetologist, who could have pointed out that tree snakes, unlike squirrels, don’t have claws; that they ascend by enwrapping, and that a major power pole is just too fat to be enwrapped."
"Most of its major power facilities lie exposed in the foothills and mountains."