defender

noun
  1. A person who protects someone or something from harm or attack. noun
    The defender stood guard at the entrance to ensure no unauthorized personnel could enter.
    As a defender of animal rights, she often participated in protests against animal cruelty.
  2. In sports, a player whose primary role is to prevent the opposing team from scoring. noun
    The defender made a crucial tackle to stop the opposing team from scoring a goal.
    In basketball, the defender's job is to block shots and prevent the offensive player from advancing.
  3. A person who supports or upholds a particular cause or policy. noun
    He was a staunch defender of free speech and often spoke out against censorship.
    As a defender of the environment, she advocated for policies to reduce pollution.