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]
(..) to make sense. First, the victim was smashed in the face with a blunt, triangular object. Injuring his hands and forearms as he tried to defend himself. Then, the force of the blows pushed him backward and caused him to fall and hit his neck on something with a sharp, (..)2016 TvShow: Bones Title: The Murder of the Meninist Season: 11 Episode 12