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.
      [1913 Webster]

   2. To undergo the process of being roasted.
      [1913 Webster]

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.
   [1913 Webster]

   To rule the roast, to be at the head of affairs. "The
      new-made duke that rules the roast." --Shak.
      [1913 Webster]

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.
      [1913 Webster]

   2. To cook by surrounding with hot embers, ashes, sand, etc.;
      as, to roast a potato in ashes.
      [1913 Webster]

            In eggs boiled and roasted there is scarce
            difference to be discerned.           --BAcon.
      [1913 Webster]

   3. To dry and parch by exposure to heat; as, to roast coffee;
      to roast chestnuts, or peanuts.
      [1913 Webster]

   4. Hence, to heat to excess; to heat violently; to burn.
      "Roasted in wrath and fire." --Shak.
      [1913 Webster]

   5. (Metal.) To dissipate by heat the volatile parts of, as
      ores.
      [1913 Webster]

   6. To banter severely. [Colloq.] --Atterbury.
      [1913 Webster]

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]