The Collaborative International Dictionary of English v.0.48:

Suborn \Sub*orn"\, v. t. [imp. & p. p. Suborned; p. pr. & vb.
   n. Suborning.] [F. suborner, L. subornare; sub under,
   secretly + ornare to furnish, provide, equip, adorn. See
   Ornament.]
   1. (Law) To procure or cause to take a false oath amounting
      to perjury, such oath being actually taken. --Sir W. O.
      Russell.
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   2. To procure privately, or by collusion; to procure by
      indirect means; to incite secretly; to instigate.
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            Thou art suborned against his honor.  --Shak.
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            Those who by despair suborn their death. --Dryden.
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