To drive off or away; thrust back; fend or ward off; repel.To forbid; prohibit; forefend.To ward off attack from; guard against assault or injury; shield: as, to defend a fortress.To vindicate; uphold; maintain by force, argument, or evidence: as, to defend one's rights and privileges; to defend a cause or claim at law.Synonyms Protect, Shelter, etc. (see keep), guard, shield. Maintain, Vindicate, etc. See assert.In law, to make opposition; enter or make defense: as, the party comes into court, defends, and says.