The Collaborative International Dictionary of English v.0.48:

Intimidation \In*tim`i*da"tion\, n. [Cf. F. intimidation.]
   The act of making timid or fearful or of deterring by
   threats; the state of being intimidated; as, the voters were
   kept from the polls by intimidation.
   [1913 Webster]

         The king carried his measures in Parliament by
         intimidation.                            --Paley.
   [1913 Webster]

WordNet (r) 3.0 (2006):

intimidation
    n 1: the act of intimidating a weaker person to make them do
         something [syn: bullying, intimidation]
    2: the feeling of discouragement in the face of someone's
       superior fame or wealth or status etc.
    3: the feeling of being intimidated; being made to feel afraid
       or timid
    4: a communication that makes you afraid to try something [syn:
       determent, deterrence, intimidation]