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]
(..) This is our town, Jimmy. Everybody knew something was going on, and no one did a thing. - We gotta put an end to it. - Don't tell me what I gotta do. Yeah, I helped defend these scumbags, but that's my job, Robby. I was doing my job. Yeah. You and everyone else. Get out of my house. (..)2015 Spotlight