The Collaborative International Dictionary of English v.0.48:

Millinery \Mil"li*ner*y\, n.
   1. The articles made or sold by milliners, as headdresses,
      hats or bonnets, laces, ribbons, and the like.
      [1913 Webster]

   2. The business of work of a milliner.
      [1913 Webster]

WordNet (r) 3.0 (2006):

millinery
    n 1: shop selling women's hats [syn: millinery, hat shop]
    2: hats for women; the wares sold by a milliner [syn:
       millinery, woman's hat]

Moby Thesaurus II by Grady Ward, 1.0:

19 Moby Thesaurus words for "millinery":
   bootmaking, cap, chapeau, cobbling, coverchief, dressmaking,
   garment making, handkerchief, hat, hatmaking, headcloth, headdress,
   headgear, headpiece, headtire, headwear, kerchief, lid,
   tailoring