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]
(..) Do not burden yourself with treasures. Take only what provisions you need. Helm's Deep. They flee to the mountains when they should stand and fight. Who will defend them if not their king? He's only doing what he thinks is best for his people. Helm's Deep has saved them in the past. (..)2002 The Lord of the Rings: The Two Towers
(..) ... ... . Th'odred. Your son is badly wounded, my lord. He was ambushed by Orcs. If we don't defend our country, Saruman will take it by force. That is a lie. Saruman the White has ever been our friend and ally. Gr'ma. (..)2002 The Lord of the Rings: The Two Towers