Source : Webster's Revised Unabridged Dictionary (1913)

Disappointed \Dis`ap*point"ed\, a.
   1. Defeated of expectation or hope; balked; as, a
      disappointed person or hope.

   2. Unprepared; unequipped. [Obs.]

            Cut off even in the blossoms of my sin, Unhouseled,
            disappointed, unaneled.               --Shak.

Source : WordNet®

disappointed
     adj : disappointingly unsuccessful; "disappointed expectations and
           thwarted ambitions"; "their foiled attempt to capture
           Calais"; "many frustrated poets end as pipe-smoking
           teachers"; "his best efforts were thwarted" [syn: {defeated},
            {discomfited}, {foiled}, {frustrated}, {thwarted}]