The Collaborative International Dictionary of English v.0.48:

Barbecue \Bar"be*cue\, v. t. [imp. & p. p. Barbecued; p. pr. &
   vb. n. Barbecuing.]
   1. To dry or cure by exposure on a frame or gridiron.
      [1913 Webster]

            They use little or no salt, but barbecue their game
            and fish in the smoke.                --Stedman.
      [1913 Webster]

   2. To roast or broil whole, as an ox or hog.
      [1913 Webster]

            Send me, gods, a whole hog barbecued. --Pope.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

barbecued \barbecued\ adj.
   Cooked on a barbecue.

   Syn: grilled.
        [WordNet 1.5]

WordNet (r) 3.0 (2006):

barbecued
    adj 1: cooked over an outdoor grill [syn: barbecued,
           grilled]

Moby Thesaurus II by Grady Ward, 1.0:

27 Moby Thesaurus words for "barbecued":
   baked, boiled, braised, broiled, browned, coddled, cooked, curried,
   deviled, fired, fricasseed, fried, grilled, heated, oven-baked,
   pan-broiled, parboiled, poached, roast, roasted, sauteed,
   scalloped, seared, shirred, steamed, stewed, toasted