Source : Webster's Revised Unabridged Dictionary (1913)

Instigation \In`sti*ga"tion\, n. [L. instigatio: cf. F.
   instigation.]
   The act of instigating, or the state of being instigated;
   incitement; esp. to evil or wickedness.

         The baseness and villainy that . . . the instigation of
         the devil could bring the sons of men to. --South.

Source : WordNet®

instigation
     n 1: the verbal act of urging on [syn: {abetment}]
     2: deliberate and intentional triggering (of trouble or
        discord) [syn: {fomentation}]