The Collaborative International Dictionary of English v.0.48:

Unorganized \Un*or"gan*ized\, a.
   Not organized; being without organic structure; specifically
   (Biol.), not having the different tissues and organs
   characteristic of living organisms, nor the power of growth
   and development; as, the unorganized ferments. See the Note
   under Ferment, n., 1.
   [1913 Webster]

WordNet (r) 3.0 (2006):

unorganized
    adj 1: not having or belonging to a structured whole;
           "unorganized territories lack a formal government" [syn:
           unorganized, unorganised] [ant: organized]
    2: not affiliated in a trade union; "the workers in the plant
       were unorganized" [syn: unorganized, unorganised,
       nonunionized, nonunionised]

Moby Thesaurus II by Grady Ward, 1.0:

117 Moby Thesaurus words for "unorganized":
   ad-lib, aimless, amorphic, amorphous, anarchic, baggy, blobby,
   blurred, blurry, capricious, casual, caught napping,
   caught off balance, caught short, chaotic, characterless, confused,
   desultory, disarticulated, disconnected, discontinuous, disjointed,
   disjunct, disordered, disorderly, dispersed, disproportionate,
   erratic, extemporaneous, extemporized, featureless, fitful,
   formless, frivolous, fuzzy, gratuitous, haphazard, hasty, hazy,
   hit-or-miss, immethodical, impromptu, improvised, inchoate,
   incoherent, indecisive, indefinite, indeterminate, indiscriminate,
   inform, inorganic, irregular, kaleidoscopic, lumpen, makeshift,
   meaningless, mineral, misshapen, misty, muddled, nonbiological,
   nondescript, nonorganic, nonsymmetrical, nonsystematic, nonuniform,
   obscure, orderless, planless, precipitate, promiscuous, random,
   rough-and-ready, senseless, shapeless, snap, spasmodic, sporadic,
   straggling, straggly, surprised, systemless, taken aback,
   taken by surprise, taken unawares, tripped up, unarranged, unbegun,
   unclassified, unclear, unconcocted, unconnected, uncontrived,
   undefined, undeliberated, undevised, undirected, ungraded,
   unhatched, unjoined, unmade, unmanufactured, unmethodical,
   unordered, unorganic, unplanned, unpremeditated, unprepared,
   unprimed, unready, unsorted, unstudied, unsymmetrical,
   unsystematic, ununiform, vague, wandering