The Collaborative International Dictionary of English v.0.48:

Cincture \Cinc"ture\, n. [L. cinctura, fr. cingere, cinctum, to
   gird.]
   1. A belt, a girdle, or something worn round the body, -- as
      by an ecclesiastic for confining the alb.
      [1913 Webster]

   2. That which encompasses or incloses; an inclosure. "Within
      the cincture of one wall." --Bacon.
      [1913 Webster]

   3. (Arch.) The fillet, listel, or band next to the apophyge
      at the extremity of the shaft of a column.
      [1913 Webster]

WordNet (r) 3.0 (2006):

cincture
    n 1: a band of material around the waist that strengthens a
         skirt or trousers [syn: girdle, cincture, sash,
         waistband, waistcloth]