The Collaborative International Dictionary of English v.0.48:

Uninvolved \Uninvolved\
   See involved.

WordNet (r) 3.0 (2006):

uninvolved
    adj 1: not involved; "being uninvolved he remained objective"
           [ant: involved]
    2: showing lack of emotional involvement; "adopted a degage pose
       on the arm of the easy chair"- J.S.Perelman; "she may be
       detached or even unfeeling but at least she's not
       hypocritically effusive"; "an uninvolved bystander" [syn:
       degage, detached, uninvolved]

Moby Thesaurus II by Grady Ward, 1.0:

67 Moby Thesaurus words for "uninvolved":
   Laodicean, afoot and lighthearted, aloof, apathetic, at large,
   at liberty, bored, careless, centrist, clear, detached, disengaged,
   disinterested, distant, easygoing, emancipated, even, fifty-fifty,
   footloose, footloose and fancy-free, free, free and easy,
   free as air, freeborn, freed, go-as-you-please, half-and-half,
   heedless, impartial, impassive, in the clear, incomplex, incurious,
   independent, indifferent, insouciant, liberated, listless, loose,
   midway, mindless, moderate, neuter, neutral, nonaligned,
   noncommitted, nonpartisan, on the fence, on the loose, passive,
   phlegmatic, regardless, released, scot-free, stolid,
   straightforward, third-force, third-world, unattached, uncommitted,
   uncomplicated, unconcerned, unengaged, uninquiring, uninterested,
   unmindful, withdrawn