Source : Webster's Revised Unabridged Dictionary (1913)

Deterrence \De*ter"rence\, n.
   That which deters; a deterrent; a hindrance. [R.]

Source : WordNet®

deterrence
     n 1: a negative motivational influence [syn: {disincentive}]
          [ant: {incentive}]
     2: a communication that makes you afraid to try something [syn:
         {determent}, {intimidation}]
     3: the act or process of discouraging actions or preventing
        occurrences by instilling fear or doubt or anxiety