introverted

CIDE DICTIONARY

introverted, adj. 

•  examining one's own sensory and perceptual experiences. Contrasted with extrospective.  [WordNet 1.5]
•  marked by concern predominantly with oneself or one's own feelings. Contrasted with extroverted.  [WordNet 1.5]

THESAURUS

introverted

Olympian, aloof, arsy-varsy, ass over elbows, back-to-front, backward, backwards, bashful, blank, capsized, chiastic, chilled, chilly, cold, constrained, cool, detached, discreet, distant, everted, expressionless, forbidding, frigid, frosty, guarded, hyperbatic, icy, impassive, impersonal, inaccessible, ingoing, inner-directed, inside out, introversive, introvert, invaginated, inversed, inverted, modest, offish, outside in, palindromic, remote, removed, repressed, reserved, restrained, resupinate, reticent, retiring, retroverted, reversed, shrinking, standoff, standoffish, subdued, subjective, suppressed, topsy-turvy, transposed, unaffable, unapproachable, uncongenial, undemonstrative, unexpansive, ungenial, upside-down, withdrawn, wrong side out