noun
dominant player; single strong player
Used especially in politics, sports, or business to describe a situation where one entity overwhelmingly dominates others.
政界では一強状態が続いている。
In the political world, a single dominant force continues.
このリーグは一強で、他のチームは太刀打ちできない。
This league has one overwhelmingly strong team, and the others can't compete.