The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

   2. To warm thoroughly; as, to toast the feet.
      [1913 Webster]

   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.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

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.
      [1913 Webster]

            My sober evening let the tankard bless,
            With toast embrowned, and fragrant nutmeg fraught.
                                                  --T. Warton.
      [1913 Webster]

   2. A lady in honor of whom persons or a company are invited
      to drink; -- so called because toasts were formerly put
      into the liquor, as a great delicacy.
      [1913 Webster]

            It now came to the time of Mr. Jones to give a toast
            . . . who could not refrain from mentioning his dear
            Sophia.                               --Fielding.
      [1913 Webster]

   3. Hence, any person, especially a person of distinction, in
      honor of whom a health is drunk; hence, also, anything so
      commemorated; a sentiment, as "The land we live in," "The
      day we celebrate," etc.
      [1913 Webster]

   Toast rack, a small rack or stand for a table, having
      partitions for holding slices of dry toast.
      [1913 Webster]

WordNet (r) 3.0 (2006):

toast
    n 1: slices of bread that have been toasted
    2: a celebrity who receives much acclaim 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, toast]
    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: crispen, toast, crisp]
    2: propose a toast to; "Let us toast the birthday girl!"; "Let's
       drink to the New Year" [syn: toast, drink, pledge,
       salute, wassail]

The Free On-line Dictionary of Computing (19 January 2023):

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)


The Jargon File (version 4.4.7, 29 Dec 2003):

toast


    1. n.Any completely inoperable system or component, esp. one that has just
    crashed and burned: “Uh, oh ... I think the serial board is toast.” (This
    sense went mainstream around 1993.)

    2. vt. To cause a system to crash accidentally, especially in a manner that
    requires manual rebooting. “Rick just toasted the firewall machine again.
    ” Compare fried.