Source : Webster's Revised Unabridged Dictionary (1913)

Repartee \Rep`ar*tee"\ (r?p`3r-t?"), n. [F. repartie, fr.
   repartir to reply, depart again; pref. re- re- partir to
   part, depart. See {Part}.]
   A smart, ready, and witty reply.

         Cupid was as bad as he; Hear but the youngster's
         repartee.                                --Prior.

   Syn: Retort; reply. See {Retort}.

Repartee \Rep`ar*tee"\, v. i. [imp. & p. p. {Reparteed} (-t?d");
   p. pr. & vb. n. {Reparteeing}.]
   To make smart and witty replies. [R.] --Prior.

Source : WordNet®

repartee
     n : adroitness and cleverness in reply