Definitions from Wiktionary ( )

▸ verb:  (transitive) To ward off attacks against; to fight to protect; to guard.
▸ verb:  (transitive) To support by words or writing; to vindicate, talk in favour of.
▸ verb:  (transitive, law) To make legal defence of; to represent (the accused).
▸ verb:  (sports) To focus one's energies and talents on preventing opponents from scoring, as opposed to focusing on scoring.
▸ verb:  (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.
▸ verb:  (poker slang) To call a raise from the big blind.
▸ verb:  (transitive, obsolete) To ward off, repel (an attack or attacker).
▸ verb:  (transitive, obsolete) To prevent, to keep (from doing something).
▸ verb:  (transitive, intransitive, obsolete) To prohibit, forbid.

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