Source : Webster's Revised Unabridged Dictionary (1913)

Oversell \O`ver*sell`\, v. t. [imp. & p. p. {Oversold}; p. pr. &
   vb. n. {Overselling}. ]
   1. To sell for a higher price than; to exceed in selling
      price.

            One whose beauty Would oversell all Italy. --Beau. &
                                                  Fl.

   2. To sell beyond means of delivery. [Brokers'Cant]

   {Oversold market} (Brokers' Cant), a market in which stocks
      or commodities have been sold ``short'' to such an extent
      that it is difficult to obtain them for delivery.