What is the meaning of Defend?

To ward off attacks against; to fight to protect; to guard.

To support by words or writing; to vindicate, talk in favour of.

To make legal defence of; to represent (the accused).

To focus one's energies and talents on preventing opponents from scoring, as opposed to focusing on scoring.

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.

To call a raise from the big blind.

To ward off, repel (an attack or attacker).

To prevent, to keep (from doing something).

To prohibit, forbid.

Source: wiktionary.org