The Collaborative International Dictionary of English v.0.48:

Rectification \Rec`ti*fi*ca"tion\ (r?k`t?*f?*k?1sh?n), n. [Cf.
   F. rectification.]
   1. The act or operation of rectifying; as, the rectification
      of an error; the rectification of spirits.
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            After the rectification of his views, he was
            incapable of compromise with profounder shapes of
            error.                                --De Quincey.
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   2. (Geom.) The determination of a straight line whose length
      is equal a portion of a curve.
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   Rectification of a globe (Astron.), its adjustment
      preparatory to the solution of a proposed problem.
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