The Collaborative International Dictionary of English v.0.48:

Uncommitted \Uncommitted\
   See committed.

WordNet (r) 3.0 (2006):

uncommitted
    adj 1: not bound or pledged [ant: committed]
    2: not associated in an exclusive sexual relationship [syn:
       unattached, uncommitted] [ant: attached, committed]
    3: not busy; not otherwise committed; "he was not available for
       comment"; "he was available and willing to accompany her"
       [syn: available, uncommitted]

Moby Thesaurus II by Grady Ward, 1.0:

45 Moby Thesaurus words for "uncommitted":
   Laodicean, afoot and lighthearted, apathetic, at large, at liberty,
   centrist, clear, detached, disengaged, 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, impartial, in the clear, independent, indifferent,
   liberated, loose, midway, moderate, neuter, neutral, nonaligned,
   noncommitted, nonpartisan, on the fence, on the loose, passive,
   released, scot-free, third-force, third-world, unattached,
   unengaged, uninvolved