[1] : The Collaborative International Dictionary of English v.0.48

undirected \un`direct"ed\, a. in senses 1 and 2, pref. un- not
   + directed; in sense 3 properly p. p. of undirect.
   1. not directed; not guided; left without direction.
      1913 webster

   2. not addressed; not superscribed, as a letter.
      1913 webster

   3. misdirected; misled; led astray. r.
      1913 webster

[2] : WordNet (r) 2.0

undirected
     adj : aimlessly drifting syn: adriftp, afloatp, aimless,
            directionless, planless, rudderless
see also:
adriftp afloatp aimless directionless planless rudderless 

[3] : Moby Thesaurus II by Grady Ward, 1.0

94 moby thesaurus words for "undirected":
   aberrant, aberrative, aimless, amorphous, capricious, casual,
   causeless, circuitous, departing, designless, desultory, deviant,
   deviating, deviative, deviatory, devious, digressive,
   disarticulated, discontinuous, discursive, disjunct, disordered,
   dispersed, disproportionate, driftless, dysteleological, errant,
   erratic, excursive, fitful, formless, frivolous, gratuitous,
   haphazard, hit-or-miss, immethodical, inchoate, incoherent,
   indirect, indiscriminate, inexplicable, irregular, labyrinthine,
   mazy, meandering, meaningless, mindless, misshapen, nonsymmetrical,
   nonsystematic, nonuniform, orderless, out-of-the-way, planetary,
   planless, promiscuous, purposeless, rambling, random, roving,
   senseless, serpentine, shapeless, shifting, snaky, spasmodic,
   sporadic, stochastic, straggling, straggly, stray, swerving,
   systemless, turning, twisting, unaccountable, unarranged,
   unclassified, ungraded, unjoined, unmethodical, unmotivated,
   unordered, unorganized, unsorted, unsymmetrical, unsystematic,
   ununiform, vagrant, vague, veering, wandering, winding, zigzag

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