Wordnet 3.0
NOUN (2)
1. 
 two stitches forming a cross or X; 
2. 
 embroidery done with pairs of stitches that cross each other; 
The Collaborative International Dictionary of English v.0.48:
Cross-stitch \Cross"-stitch`\ (-st?ch`; 224), n.
   1. A form of stitch, where the stitches are diagonal and in
      pairs, the thread of one stitch crossing that of the
      other. "Tent and cross-stitch." --Sir W. Scott. --
      Cross"-stitch`, v. t. & i.
      [1913 Webster]
   2. embroidery done in cross-stitch.
      [WordNet 1.5]
WordNet (r) 3.0 (2006):
cross-stitch
    n 1: two stitches forming a cross or X
    2: embroidery done with pairs of stitches that cross each other