Source : Webster's Revised Unabridged Dictionary (1913)

Dilapidate \Di*lap"i*date\, v. t. [imp. & p. p. {Dilapidated};
   p. pr. & vb. n. {Dilapidating}.] [L. dilapidare to scatter
   like stones; di- = dis- + lapidare to throw stones, fr. lapis
   a stone. See {Lapidary}.]
   1. To bring into a condition of decay or partial ruin, by
      misuse or through neglect; to destroy the fairness and
      good condition of; -- said of a building.

            If the bishop, parson, or vicar, etc., dilapidates
            the buildings, or cuts down the timber of the
            patrimony.                            --Blackstone.

   2. To impair by waste and abuse; to squander.

            The patrimony of the bishopric of Oxon was much
            dilapidated.                          --Wood.

Dilapidated \Di*lap"i*da`ted\, a.
   Decayed; fallen into partial ruin; injured by bad usage or
   neglect.

         A deserted and dilapidated buildings.    --Cooper.

Source : WordNet®

dilapidated
     adj : in deplorable condition; "a street of bedraggled tenements";
           "a broken-down fence"; "a ramshackle old pier"; "a
           tumble-down shack" [syn: {bedraggled}, {broken-down}, {ramshackle},
            {tatterdemalion}, {tumble-down}, {unsound}]