The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

         Cupid was as bad as he;
         Hear but the youngster's repartee.       --Prior.
   [1913 Webster]

   Syn: Retort; reply. See Retort.
        [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
   [1913 Webster]

WordNet (r) 3.0 (2006):

repartee
    n 1: adroitness and cleverness in reply

The Devil's Dictionary (1881-1906):

REPARTEE, n.  Prudent insult in retort.  Practiced by gentlemen with a
constitutional aversion to violence, but a strong disposition to
offend.  In a war of words, the tactics of the North American Indian.