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"

Moby Thesaurus II by Grady Ward, 1.0:

77 Moby Thesaurus words for "marketing":
   balance of trade, big business, business, business dealings, buy,
   buying, buying power, buying up, catalog buying, coemption,
   commerce, commercial affairs, commercial relations, consumer power,
   consumer preference study, consumer research, consumer sovereignty,
   consumer survey, consumerism, cornering, dealing, dealings,
   direct-mail selling, emption, fair trade, free trade, hard sell,
   hawking, high-pressure salesmanship, hire purchase, huckstering,
   impulse buying, industry, installment buying, intercourse, jobbing,
   low-pressure salesmanship, mail-order buying, mail-order selling,
   market, market research, marketing research, mercantile business,
   merchandising, merchantry, money illusion, multilateral trade,
   peddling, promotion, purchase, purchasing, purchasing power,
   rebuying, reciprocal trade, repurchase, restraint of trade, retail,
   retailing, sales, sales campaign, sales promotion, salesmanship,
   selling, sellout, shopping, shopping spree, small business,
   soft sell, the business world, the marketplace, trade, traffic,
   truck, unilateral trade, wholesale, wholesaling, window-shopping