The team is looking to 'defend' its national title. [=to win the national title again]
As a U.S. senator, it is my responsibility to 'defend' [='uphold'] the Constitution.
She successfully 'defended' her championship. [=she won the championship again]
(..) Let them fight. Oh, Lord God, we give thanks for the opportunities that you've given us as we go together as comrades to defend our great nation. We thank you for the time and the service that you've given us together. And as we are about to leave for another, let us have the strength... (..)2014 Godzilla