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

uncommunicative \uncommunicative\
   see communicative.
see also:
communicative 

[2] : WordNet (r) 2.0

uncommunicative
     adj : not inclined to talk or give information or express opinions
           syn: incommunicative ant: communicative
see also:
incommunicative communicative 

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

72 moby thesaurus words for "uncommunicative":
   aloof, autistic, bashful, canny, careful, cautious, circumspect,
   close, close-lipped, close-tongued, closemouthed, dark, deliberate,
   discreet, disinclined to communicate, dissociable, distant,
   evasive, gingerly, guarded, heedful, hesitant, incompatible,
   insociable, judicious, leaving out nothing, meaningless, mindful,
   mopey, mopish, morose, noncommittal, nongregarious, offish,
   on guard, overlooking no possibility, pawky, politic, prudent,
   regardful, reserved, reticent, safe, secret, secretive,
   self-contained, self-sufficient, shifty, slow to act, snug,
   socially incompatible, standoffish, sullen, taciturn, tentative,
   thorough, tight-lipped, unadventurous, unapproachable, unbending,
   unclubbable, uncompanionable, uncongenial, unconversable, undaring,
   unenterprising, unfriendly, ungenial, unprecipitate, unsociable,
   unsocial, withdrawn

Uncommunicative >> U Words
Uncommunicative, definition of term: Uncommunicative
uncommunicative_pag1.html

Uncommunicative >> U Words
Uncommunicative, definition of term: Uncommunicative
uncommunicative_pag1.html