obviation

from WordNet (r) 3.0 (2006)

obviation
    n 1: the act of preventing something by anticipating and
         disposing of it effectively [syn: {obviation},
         {forestalling}, {preclusion}]

from The Collaborative International Dictionary of English v.0.48

Obviation \Ob`vi*a"tion\, n.
   The act of obviating, or the state of being obviated.
   [1913 Webster]

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