The Collaborative International Dictionary of English v.0.48:

petite \pe*tite"\, a. [F., fem. of petit.]
   Small, little; -- used especially of a woman or girl, of
   small size and trim figure; as, her petite figure.

   Syn: bantam, diminutive, lilliputian, midget, tiny.
        [Webster 1913 Suppl.]

The Collaborative International Dictionary of English v.0.48:

petite \pe*tite"\, n. [F., fem. of petit.]
   1. A size category of women's clothing, for women with less
      than average height.
      [PJC]

   2. An aricle of women's clothing classified in the
      petite[1] size category.
      [PJC]

   3. A girl or woman whose figure is best fit by a petite[1]
      garment.
      [PJC]

WordNet (r) 3.0 (2006):

petite
    adj 1: very small; "diminutive in stature"; "a lilliputian chest
           of drawers"; "her petite figure"; "tiny feet"; "the
           flyspeck nation of Bahrain moved toward democracy" [syn:
           bantam, diminutive, lilliputian, midget,
           petite, tiny, flyspeck]
    n 1: a garment size for short or slender women

Moby Thesaurus II by Grady Ward, 1.0:

28 Moby Thesaurus words for "petite":
   bantam, cramped, dainty, delicate, diminutive, dinky, dwarf,
   exiguous, half-pint, knee-high, lilliputian, limited, little,
   miniature, monkey, one-horse, piddling, pindling, pint-sized, poky,
   puny, short, slight, small, smallish, tiny, two-by-four, wee