1. A nation, organization, or entity that has the most influence, authority, or control in a particular field, region, or international context
The United States has been a leading power in technological innovation for decades.
Os Estados Unidos têm sido uma potência dominante em inovação tecnológica por décadas.
2. A major force or factor that directs or controls a situation
Germany was the leading power in European politics during that era.
A Alemanha era a potência dominante na política europeia naquela época.