The Collaborative International Dictionary of English v.0.48:

Traffic \Traf"fic\, n. [Cf. F. trafic, It. traffico, Sp.
   tr['a]fico, tr['a]fago, Pg. tr['a]fego, LL. traficum,
   trafica. See Traffic, v.]
   1. Commerce, either by barter or by buying and selling;
      interchange of goods and commodities; trade.
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            A merchant of great traffic through the world.
                                                  --Shak.
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            The traffic in honors, places, and pardons.
                                                  --Macaulay.
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   Note: This word, like trade, comprehends every species of
         dealing in the exchange or passing of goods or
         merchandise from hand to hand for an equivalent, unless
         the business of relating may be excepted. It signifies
         appropriately foreign trade, but is not limited to
         that.
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   2. Commodities of the market. [R.]
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            You 'll see a draggled damsel
            From Billingsgate her fishy traffic bear. --Gay.
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   3. The business done upon a railway, steamboat line, etc.,
      with reference to the number of passengers or the amount
      of freight carried.
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   Traffic return, a periodical statement of the receipts for
      goods and passengers, as on a railway line.

   Traffic taker, a computer of the returns of traffic on a
      railway, steamboat line, etc.
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