self-enclosed

from WordNet (r) 3.0 (2006)

self-enclosed
    adj 1: of self-imposed enclosure or confinement; "a self-
           enclosed Jewish cosmos"

from The Collaborative International Dictionary of English v.0.48

enclosed \enclosed\ adj.
   surrounded or closed in, usually on all sides. Opposite of
   {unenclosed}. [Narrower terms: {basined}; {capsulate,
   capsulated}; {closed, closed in(predicate)}; {coarctate};
   {confined, fenced in, penned}; {embedded, fixed}; {embedded,
   surrounded}; {encircled}; {enveloped}; {fogbound};
   {self-enclosed}; {surrounded, encircled}]
   [WordNet 1.5]