Source : Webster's Revised Unabridged Dictionary (1913)

Toast \Toast\, v. t. [imp. & p. p. {Toasted}; p. pr. & vb. n.
   {Toasting}.] [OF. toster to roast, toast, fr. L. torrere,
   tostum, to parch, roast. See {Torrid}.]
   1. To dry and brown by the heat of a fire; as, to toast
      bread.

   2. To warm thoroughly; as, to toast the feet.

   3. To name when a health is proposed to be drunk; to drink to
      the health, or in honor, of; as, to toast a lady.

Toast \Toast\, n. [OF. toste, or tost['e]e, toasted bread. See
   {Toast}, v.]
   1. Bread dried and browned before a fire, usually in slices;
      also, a kind of food prepared by putting slices of toasted
      bread into milk, gravy, etc.

Source : WordNet®

toast
     n 1: slices of bread that have been toasted
     2: a celebrity who receives much accalim and attention; "he was
        the toast of the town"
     3: a person in desperate straits; someone doomed; "I'm a goner
        if this plan doesn't work"; "one mistake and you're toast"
        [syn: {goner}]
     4: a drink in honor of or to the health of a person or event
        [syn: {pledge}]

toast
     v 1: make brown and crisp by heating; "toast bread"; "crisp
          potatoes" [syn: {crisp}]
     2: propose a toast to; "Let us toast the birthday girl!";
        "Let's drink to the New Year" [syn: {drink}, {pledge}, {salute},
         {wassail}]

Source : Free On-Line Dictionary of Computing

toast
     
         1. Any completely inoperable system or component,
        especially one that has just crashed and burned: "Uh, oh ... I
        think the serial board is toast."
     
        2. To cause a system to crash accidentally, especially in a
        manner that requires manual rebooting.  "Rick just toasted the
        {firewall machine} again."
     
        Compare {fried}.
     
        (1995-05-01)