The Collaborative International Dictionary of English v.0.48:

Subornation \Sub`or*na"tion\, n. [F. subornation.]
   1. (Law) The act of suborning; the crime of procuring a
      person to take such a false oath as constitutes perjury.
      --Blackstone.
      [1913 Webster]

   2. The sin or offense of procuring one to do a criminal or
      bad action, as by bribes or persuasion.
      [1913 Webster]

            Foul subornation is predominant.      --Shak.
      [1913 Webster]

            The sort of chicanery attending the subornation of
            managers in the Leibnitz controversy. --De Quinsey.
      [1913 Webster]

WordNet (r) 3.0 (2006):

subornation
    n 1: underhandedly or improperly inducing someone to do
         something improper or unlawful
    2: perjured testimony that someone was persuaded to give