The Collaborative International Dictionary of English v.0.48:

Ironing \I"ron*ing\, n.
   1. The act or process of smoothing, as clothes, with hot
      flatirons.
      [1913 Webster]

   2. The clothes ironed.
      [1913 Webster]

   Ironing board, a flat board, upon which clothes are laid
      while being ironed.
      [1913 Webster]

WordNet (r) 3.0 (2006):

ironing board
    n 1: narrow padded board on collapsible supports; used for
         ironing clothes