Source : Webster's Revised Unabridged Dictionary (1913)

Vulnerable \Vul"ner*a*ble\, a. [L. vulnerabilis wounding,
   injurious, from vulnerare to wound, vulnus a wound; akin to
   Skr. vra?a: cf. F. vuln['e]rable.]
   1. Capable of being wounded; susceptible of wounds or
      external injuries; as, a vulnerable body.

            Achilles was vulnerable in his heel; and there will
            be wanting a Paris to infix the dart. --Dr. T.
                                                  Dwight.

   2. Liable to injury; subject to be affected injuriously;
      assailable; as, a vulnerable reputation.

            His skill in finding out the vulnerable parts of
            strong minds was consummate.          --Macaulay.

Source : WordNet®

vulnerable
     adj 1: susceptible to attack; "a vulnerable bridge" [ant: {invulnerable}]
     2: susceptible to criticism or persuasion or temptation;
        "vulnerable to bribery"; "an argument vulnerable to
        refutation"
     3: capable of being wounded or hurt; "vulnerable parts of the
        body"
     4: susceptible to physical or emotional injury; "at a tender
        age" [syn: {tender}]