1. 
2. 
[syn: collected, equanimous, poised, self-collected, self-contained, self-possessed]
The Collaborative International Dictionary of English v.0.48:
Self-contained \Self`-con*tained"\, a.
   1. Having self-control; reserved; uncommunicative; wholly
      engrossed in one's self.
      [1913 Webster]
   2. (Mach.) Having all the essential working parts connected
      by a bedplate or framework, or contained in a case, etc.,
      so that mutual relations of the parts do not depend upon
      fastening outside of the machine itself.
      [1913 Webster]
   Self-contained steam engine.
      (a) A steam engine having both bearings for the crank
          shaft attached to the frame of the engine.
      (b) A steam engine and boiler combined and fastened
          together; a portable steam engine.
          [1913 Webster]
WordNet (r) 3.0 (2006):
self-contained
    adj 1: constituting a complete and independent unit in and of
           itself; "the university is like a self-contained city
           with shops and all amenities"
    2: in full control of your faculties; "the witness remained
       collected throughout the cross-examination"; "perfectly
       poised and sure of himself"; "more self-contained and more
       dependable than many of the early frontiersmen"; "strong and
       self-possessed in the face of trouble" [syn: collected,
       equanimous, poised, self-collected, self-contained,
       self-possessed]
Moby Thesaurus II by Grady Ward, 1.0:
106 Moby Thesaurus words for "self-contained":
   acquisitive, aloof, ambitious for self, autarchic, autarkic,
   autistic, autonomous, bashful, calm, careerist, close, collected,
   complete, composed, controlled, cool, detached, dissociable,
   distant, egotistical, entire, even-tempered, formal, free-spirited,
   freewheeling, grasping, grave, greedy, imperturbable, in control,
   incompatible, independent, individualistic, inner-directed,
   insociable, mopey, mopish, morose, narcissistic, neutral,
   nonaligned, nongregarious, nonpartisan, peaceful, personalistic,
   placid, possessive, privatistic, remote, reserved, reticent,
   self-absorbed, self-admiring, self-advancing, self-besot,
   self-centered, self-considerative, self-controlled, self-dependent,
   self-determined, self-devoted, self-directing, self-esteeming,
   self-governed, self-governing, self-indulgent, self-interested,
   self-jealous, self-occupied, self-pleasing, self-possessed,
   self-reliant, self-seeking, self-serving, self-subsistent,
   self-sufficient, self-supporting, selfish, serene, serious, snug,
   sober, socially incompatible, solemn, sovereign, standoffish,
   sullen, third-force, third-world, tranquil, unclubbable,
   uncommunicative, uncompanionable, uncongenial, undisturbed,
   unemotional, unflappable, unfriendly, ungenial, unitary,
   unperturbed, unruffled, unsociable, unsocial, whole, withdrawn