Source : Webster's Revised Unabridged Dictionary (1913)

Emend \E*mend"\, v. t. [imp. & p. p. {Emended}; p. pr. & vb. n.
   {Emending}.] [L. emendare; e out + menda, mendum, fault,
   blemish: cf. F. ['e]mender. Cf. {Amend}, {Mend}.]
   To purge of faults; to make better; to correct; esp., to make
   corrections in (a literary work); to alter for the better by
   textual criticism, generally verbal.

   Syn: To amend; correct; improve; better; reform; rectify. See
        {Amend}.

Source : WordNet®

emend
     v : make improvements or corrections to; "the text was emended
         in the second edition"