The Collaborative International Dictionary of English v.0.48:

Brussels \Brussels\ prop. n. (Geography)
   The capital city of Belgium. Population (2000) = 949,070
   (metro). It has given its name to a kind of carpet, a kind of
   lace, etc.
   [PJC]

   Brussels carpet, a kind of carpet made of worsted yarn
      fixed in a foundation web of strong linen thread. The
      worsted, which alone shows on the upper surface in drawn
      up in loops to form the pattern.

   Brussels ground, a name given to the handmade ground of
      real Brussels lace. It is very costly because of the
      extreme fineness of the threads.

   Brussels lace, an expensive kind of lace of several
      varieties, originally made in Brussels; as, Brussels
      point, Brussels ground, Brussels wire ground.

   Brussels net, an imitation of Brussels ground, made by
      machinery.

   Brussels point. See Point lace.

   Brussels sprouts (Bot.), a plant of the Cabbage family,
      which produces, in the axils of the upright stem, numerous
      small green heads, or "sprouts," each a cabbage in
      miniature, of one or two inches in diameter; the
      thousand-headed cabbage.

   Brussels wire ground, a ground for lace, made of silk, with
      meshes partly straight and partly arched.
      [1913 Webster]

WordNet (r) 3.0 (2006):

Brussels
    n 1: the capital and largest city of Belgium; seat of the North
         Atlantic Treaty Organization [syn: Bruxelles, Brussels,
         Belgian capital, capital of Belgium]

U.S. Gazetteer Places (2000):

Brussels, IL -- U.S. village in Illinois
   Population (2000):    141
   Housing Units (2000): 70
   Land area (2000):     0.606699 sq. miles (1.571344 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.606699 sq. miles (1.571344 sq. km)
   FIPS code:            09148
   Located within:       Illinois (IL), FIPS 17
   Location:             38.947275 N, 90.588630 W
   ZIP Codes (1990):
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Brussels, IL
    Brussels