Defenseless \De*fense"less\, a. Destitute of defense; unprepared to resist attack; unable to oppose; unprotected. [Also spelled {defenceless}.]-- {De*fense"less*ly}, adv. -- {De*fense"less*ness}, n. [1913 Webster] 2. unarmed; used of persons or the military. {armed} [WordNet 1.5]