The Collaborative International Dictionary of English v.0.48:

Barbecue \Bar"be*cue\ (b[aum]"b[-e]*k[=u]), n. [In the language
   of the (Arawak or Taino) Indians of Guiana, barbacoa a frame
   on which all kinds of flesh and fish are roasted or
   smoke-dried.]
   1. a framework of metal or brick, usually with a grill on
      top, in which a fire is lighted and on which food is
      cooked, usually outdoors; -- also called a barbecue
      grill.
      [PJC]

   2. A social entertainment, where people assemble, usually in
      the open air, at which a meal is prepared on a barbecue
      grill.
      [1913 Webster +PJC]

   3. A floor, on which coffee beans are sun-dried.
      [1913 Webster]

   4. A hog, ox, or other large animal roasted or broiled whole
      for a feast.
      [1913 Webster]