Definition of defends:
(v) :
(transitive) To ward off attacks against; to fight to protect; to guard.
(v) :
(transitive) To support by words or writing; to vindicate, talk in favour of.
(v) :
(transitive, law) To make legal defence of; to represent (the accused).
(v) :
(sports) To focus one's energies and talents on preventing opponents from scoring, as opposed to focusing on scoring.
(v) :
(sports) To attempt to retain a title, or attempt to reach the same stage in a competition as one did in the previous instance of that competition.
(v) :
(cricket) Mostly in tests. The action of not putting force into hitting a shot, but to conserve energy and wear down bowlers so they can attack later.