The Collaborative International Dictionary of English v.0.48:

Market \Mar"ket\, v. i. [imp. & p. p. Marketed; p. pr. & vb.
   n. Marketing.]
   To deal in a market; to buy or sell; to make bargains for
   provisions or goods.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Marketing \Mar"ket*ing\, n.
   1. The act of selling or of purchasing in, or as in, a
      market.
      [1913 Webster]

   2. Articles in, or from, a market; supplies.
      [1913 Webster]

   3. The activities required by a producer to sell his
      products, including advertising, storing, taking orders,
      and distribution to vendors or individuals.
      [PJC]

WordNet (r) 3.0 (2006):

marketing
    n 1: the exchange of goods for an agreed sum of money [syn:
         selling, merchandising, marketing]
    2: the commercial processes involved in promoting and selling
       and distributing a product or service; "most companies have a
       manager in charge of marketing"
    3: shopping at a market; "does the weekly marketing at the
       supermarket"