The Collaborative International Dictionary of English v.0.48:

Producer \Pro*du"cer\, n.
   [1913 Webster]
   1. One who produces, brings forth, or generates.
      [1913 Webster]

   2. One who grows agricultural products, or manufactures crude
      materials into articles of use.
      [1913 Webster]

   3. (Iron & Steel Manuf.) A furnace for producing combustible
      gas which is used for fuel.
      [1913 Webster]

WordNet (r) 3.0 (2006):

producer
    n 1: someone who manufactures something [syn: manufacturer,
         producer]
    2: someone who finds financing for and supervises the making and
       presentation of a show (play or film or program or similar
       work)
    3: something that produces; "Maine is a leading producer of
       potatoes"; "this microorganism is a producer of disease"