Source : Webster's Revised Unabridged Dictionary (1913)

Medication \Med`i*ca"tion\, [L. medicatio: cf. F.
   m['e]dication.]
   The act or process of medicating.

Source : WordNet®

medication
     n 1: (medicine) something that treats or prevents or alleviates
          the symptoms of disease [syn: {medicine}, {medicament},
          {medicinal drug}]
     2: the act of treating with medicines or remedies