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]
(..) that you were here when it happened. I do solemnly swear that I will faithfully execute the office of President of the United States, preserve, protect and defend the Constitution of the United States. - So help me God. - Here we are again. You know, if you ignore all the pomp and circumstance, (..)2017 TvShow: House of Cards Title: Chapter 65 Season: 5 Episode 13