Source : Webster's Revised Unabridged Dictionary (1913)

Retail \Re*tail"\, v. t. [imp. & p. p. {Retailed};p. pr. & vb.
   n. {Retailing}.] [Cf. F. retailler to cut again; pref. re- re
   + tailler to cut. See {Retail}, n., {Tailor}, and cf.
   {Detail}.]
   1. To sell in small quantities, as by the single yard, pound,
      gallon, etc.; to sell directly to the consumer; as, to
      retail cloth or groceries.

   2. To sell at second hand. [Obs. or R.] --Pope.

   3. To distribute in small portions or at second hand; to tell
      again or to many (what has been told or done); to report;
      as, to retail slander. ``To whom I will retail my conquest
      won.'' --Shak.

            He is wit's peddler, and retails his wares At wakes
            and wassails.                         --Shak.

Source : WordNet®

retailing
     n : the activities involved in selling commodities directly to
         consumers