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]
(..) Because the real courage is to see things the way they are. Never lie to yourself. The real courage would have been not to come on the front. It's to not be afraid to defend your opinion, even if you have to sacrifice your love. I know. Now i know. From today, since i saw Svoboda's eyes. (..)1965 Forest of the Hanged
(..) was trying to switch sides. Outrageous, isn't it? Yes, of course. I had the honor to be in the Court-Martial. He didn't even defend himself. He looked at us in a strange way. I believe he was trying to defy us. Though... it wasn't defiance. It was something else. He didn't say a word. Do you smoke? (..)1965 Forest of the Hanged