Source : Webster's Revised Unabridged Dictionary (1913)

Rhetorical \Rhe*tor"ic*al\, a. [L. rhetoricus, Gr. ????. See
   {Rhetoric}.]
   Of or pertaining to rhetoric; according to, or exhibiting,
   rhetoric; oratorical; as, the rhetorical art; a rhetorical
   treatise; a rhetorical flourish.

         They permit him to leave their poetical taste
         ungratified, provided that he gratifies their
         rhetorical sense.                        --M. Arnold.
   -- {Rhe*tor"ic*al*ly}, adv. -- {Rhe*tor"ic*al*ness}, n.

Source : WordNet®

rhetorical
     adj 1: of or relating to rhetoric; "accepted two or three verbal
            and rhetorical changes I suggested"- W.A.White; "the
            rhetorical sin of the meaningless variation"- Lewis
            Mumford
     2: concerned with effect or style of writing and speaking; "a
        rhetorical question is one asked solely to produce an
        effect (especially to make an assertion) rather than to
        elicit a reply" [ant: {unrhetorical}]