The Collaborative International Dictionary of English v.0.48:

Undone \Un*done"\,
   p. p. of Undo.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Undone \Un*done"\, a. [Pref. un- not + done.]
   Not done or performed; neglected.
   [1913 Webster]

WordNet (r) 3.0 (2006):

undone
    adj 1: not done; "the work could be done or undone and nobody
           cared"
    2: doomed to extinction [syn: done for(p), ruined, sunk,
       undone, washed-up]
    3: not fastened or tied or secured; "her blouse had come undone
       at the neck"; "his shoelaces were undone"
    4: thrown into a state of disorganization or incoherence; "price
       programs became unstuck because little grain was available"
       [syn: unstuck, undone]

Moby Thesaurus II by Grady Ward, 1.0:

207 Moby Thesaurus words for "undone":
   abandoned, adrift, afloat, aghast, all up with, appalled, ashen,
   astounded, ausgespielt, awed, awestricken, awestruck, bankrupt,
   beat, beaten, bested, beyond recall, beyond remedy, blanched,
   blasted, blighted, broken, broken-down, brokenhearted, clear,
   confounded, cowed, crushed, cureless, cut up, dashed, deadly pale,
   defeated, demoralized, deserted, desolated, destroyed, detached,
   devastated, discomfited, disregarded, done for, done in, down,
   down-and-out, fallen, finished, fixed, floating, floored,
   forgotten, free, frozen, gone, gone to pot, gray with fear,
   half-done, heart-stricken, heart-struck, heartbroken, horrified,
   horror-struck, hors de combat, ignored, immedicable, in ruins,
   incomplete, incorrigible, incurable, inoperable, intimidated,
   inundated, irreclaimable, irrecoverable, irredeemable,
   irreformable, irremediable, irreparable, irretrievable,
   irreversible, irrevocable, kaput, laid aside, lambasted, lathered,
   left out, left undone, licked, loose, loosened, lost, missed,
   neglected, neurasthenic, omitted, on the skids, open, outdone,
   overborne, overcome, overlooked, overmastered, overmatched,
   overpowered, overridden, overthrown, overturned, overwhelmed,
   pale as death, pallid, panicked, paralyzed, passed by, passed over,
   passed up, past hope, past praying for, petrified, pigeonholed,
   prostrate, prostrated, put aside, put to rout, ravaged,
   reduced to jelly, remediless, rickety, routed, ruined, ruinous,
   scared stiff, scared to death, scattered, settled, shaken, shaky,
   shattered, shot, shot to pieces, shunted, sidelined, sidetracked,
   silenced, skinned, skinned alive, skipped, slighted, spoiled,
   stampeded, stricken, stunned, stupefied, terminal, terrified,
   terror-crazed, terror-haunted, terror-ridden, terror-riven,
   terror-shaken, terror-smitten, terror-struck, terror-troubled,
   trimmed, trounced, unaccomplished, unachieved, unanchored, unasked,
   unattained, unattended to, unbound, uncared-for, unchaperoned,
   uncompleted, unconsidered, unconsummated, undischarged, unexecuted,
   unfastened, unfinished, unfixed, unfulfilled, unglued, unhooked,
   unmanned, unmitigable, unnerved, unperformed, unrealized,
   unregarded, unrelievable, unsalvable, unsalvageable, unsnapped,
   unsolicited, unstrung, unstuck, untended, untied, unwatched,
   unzipped, upset, wasted, whelmed, whipped, worsted, wrecked