noun a thorn, prickle, or sting with which many plants are furnished.
2. weapon ·noun fig.: the means or instrument with which one contends against another; as, argument was his only weapon.
3. weapon ·noun an instrument of offensive of defensive combat; something to fight with; anything used, or designed to be used, in destroying, defeating, or injuring an enemy, as a gun, a sword, ·etc.