The Collaborative International Dictionary of English v.0.48:

Disintegration \Dis*in`te*gra"tion\, n.
   (a) The process by which anything is disintegrated; the
       condition of anything which is disintegrated.
       Specifically
   (b) (Geol.) The wearing away or falling to pieces of rocks or
       strata, produced by atmospheric action, frost, ice, etc.
       [1913 Webster]

             Society had need of further disintegration before
             it could begin to reconstruct itself locally.
                                                  --Motley.
       [1913 Webster]

WordNet (r) 3.0 (2006):

disintegration
    n 1: in a decomposed state [syn: decomposition,
         disintegration]
    2: a loss (or serious disruption) of organization in some
       system; "a disintegration of personality"
    3: separation into component parts [syn: dissolution,
       disintegration]
    4: the spontaneous disintegration of a radioactive substance
       along with the emission of ionizing radiation [syn: decay,
       radioactive decay, disintegration]
    5: total destruction; "bomb tests resulted in the annihilation
       of the atoll" [syn: annihilation, disintegration]