Source : Webster's Revised Unabridged Dictionary (1913)

Debilitation \De*bil`i*ta"tion\, n. [L. debilitatio: cf. F.
   d['e]bilitation.]
   The act or process of debilitating, or the condition of one
   who is debilitated; weakness.

Source : WordNet®

debilitation
     n : serious weakening and loss of energy [syn: {enervation}, {enfeeblement},
          {exhaustion}]