The Collaborative International Dictionary of English v.0.48:

Roast \Roast\, v. i.
   1. To cook meat, fish, etc., by heat, as before the fire or
      in an oven.
      [1913 Webster]

            He could roast, and seethe, and broil, and fry.
                                                  --Chaucer.
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   2. To undergo the process of being roasted.
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The Collaborative International Dictionary of English v.0.48:

Roast \Roast\, n.
   That which is roasted; a piece of meat which has been
   roasted, or is suitable for being roasted.
   [1913 Webster]

         A fat swan loved he best of any roost [roast].
                                                  --Chaucer.
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   To rule the roast, to be at the head of affairs. "The
      new-made duke that rules the roast." --Shak.
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The Collaborative International Dictionary of English v.0.48:

Roast \Roast\, v. t. [imp. & p. p. Roasted; p. pr. & vb. n.
   Roasting.] [OE. rosten, OF. rostir, F. r[^o]tir; of German
   origin; cf. OHG. r[=o]sten, G. r["o]sten, fr. OHG. r[=o]st,
   r[=o]sta, gridiron, G. rost; cf. AS. hyrstan to roast.]
   1. To cook by exposure to radiant heat before a fire; as, to
      roast meat on a spit, or in an oven open toward the fire
      and having reflecting surfaces within; also, to cook in a
      close oven.
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   2. To cook by surrounding with hot embers, ashes, sand, etc.;
      as, to roast a potato in ashes.
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            In eggs boiled and roasted there is scarce
            difference to be discerned.           --BAcon.
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   3. To dry and parch by exposure to heat; as, to roast coffee;
      to roast chestnuts, or peanuts.
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   4. Hence, to heat to excess; to heat violently; to burn.
      "Roasted in wrath and fire." --Shak.
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   5. (Metal.) To dissipate by heat the volatile parts of, as
      ores.
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   6. To banter severely. [Colloq.] --Atterbury.
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The Collaborative International Dictionary of English v.0.48:

Roast \Roast\, a. [For roasted.]
   Roasted; as, roast beef.
   [1913 Webster]

WordNet (r) 3.0 (2006):

roast
    adj 1: (meat) cooked by dry heat in an oven [syn: roast,
           roasted]
    n 1: a piece of meat roasted or for roasting and of a size for
         slicing into more than one portion [syn: roast, joint]
    2: negative criticism [syn: knock, roast]
    v 1: cook with dry heat, usually in an oven; "roast the turkey"
    2: subject to laughter or ridicule; "The satirists ridiculed the
       plans for a new opera house"; "The students poked fun at the
       inexperienced teacher"; "His former students roasted the
       professor at his 60th birthday" [syn: ridicule, roast,
       guy, blackguard, laugh at, jest at, rib, make
       fun, poke fun]

Moby Thesaurus II by Grady Ward, 1.0:

211 Moby Thesaurus words for "roast":
   Chateaubriand, aspic, assail, attack, bake, baked, banter,
   barbecue, baste, be in heat, blade roast, blanch, blaze, blister,
   bloom, boil, boiled, boiled meat, bouilli, braise, braised, breast,
   brew, brisket, broil, broiled, brown, browned, burn, casserole,
   castigate, chaff, choke, chuck, chuck roast, civet, clod, coddle,
   coddled, cold cuts, combust, cook, cooked, course, cover,
   cross-examine, cross-interrogate, cross-question,
   culinary masterpiece, culinary preparation, curried, curry, deride,
   devil, deviled, dish, do, do to perfection, entree, excoriate,
   extract information, filet mignon, fire, fired, flame, flame up,
   flank, flare, flare up, flay, flesh, flicker, flush, forcemeat,
   fricassee, fricasseed, fried, frizz, frizzle, fry, fustigate, game,
   gasp, glow, go over, griddle, grill, grilled, grin at, hachis,
   hash, haze, heat, heated, hold in derision, incandesce,
   inquisition, jape, jerky, jest, jive, joint, joke, jolly, josh,
   jugged hare, kid, knuckle, lash, laugh at, laugh to scorn, loin,
   main dish, make fun of, make game of, make inquisition,
   make merry with, meat, melt, menue viande, mince, needle,
   oven-bake, oven-baked, pan, pan-broil, pan-broiled, pant, parboil,
   parboiled, parch, pemmican, pillory, plate, plate piece, poach,
   poached, point at, poke fun at, pot roast, prepare, prepare food,
   pry out, put on, put one on, rack, radiate heat, rag, rally, razz,
   rib, rib roast, ribs, ride, ridicule, roasted, rolled roast, round,
   rump, rump roast, saddle, sausage meat, saute, sauteed, scald,
   scallop, scalloped, scarify, scathe, scorch, score, scrapple, sear,
   seared, seethe, shank, shimmer with heat, shirr, shirred,
   short ribs, shoulder, shoulder clod, side dish, simmer, sirloin,
   skin alive, slash, smile at, smolder, smother, snicker at,
   snigger at, spark, steam, steamed, stew, stewed, stifle, stir-fry,
   suffocate, sweat, swelter, tease, tenderloin, third-degree, toast,
   toasted, trounce, twit, venison, viande