The Collaborative International Dictionary of English v.0.48:

Chic \Chic\, a. [F. Cf. Chic, n.]
   Original and in good taste or form; stylish; in current
   fashion, fashionable. [Colloq.]
   [Webster 1913 Suppl. +PJC]

WordNet (r) 3.0 (2006):

chic
    adj 1: elegant and stylish; "chic elegance"; "a smart new
           dress"; "a suit of voguish cut" [syn: chic, smart,
           voguish]
    n 1: elegance by virtue of being fashionable [syn: chic,
         chicness, chichi, modishness, smartness,
         stylishness, swank, last word]

Moby Thesaurus II by Grady Ward, 1.0:

83 Moby Thesaurus words for "chic":
   braw, classy, clothes-conscious, clothes-consciousness,
   cosmopolitan, coxcombry, craze, cry, dandyism, dapper, dashing,
   dressed to advantage, dressed to kill, dressed up, elegance,
   elegant, en grande tenue, endimanche, exclusive, exquisite, fad,
   fashion, fashionable, foppery, foppishness, furore, genteel,
   good taste, gussied up, in full dress, in full feather,
   in high feather, in tails, jauntiness, jaunty, mode, modish,
   modishness, nattiness, natty, neat, neatness, nifty, nobby, posh,
   rage, recherche, ritzy, sharp, sharpness, sleek, sleekness,
   slicked up, smart, smartness, smug, snazzy, soigne, soignee,
   sophisticated, spiffiness, spiffy, spruce, style, style-conscious,
   stylish, stylishness, swank, swanky, swell, swish, tasteful,
   tastefulness, trendy, tricksy, trig, trim, trimness, vogue,
   well turned-out, well-dressed, well-groomed, with-it