Source : Webster's Revised Unabridged Dictionary (1913)

Gingerbread \Gin"ger*bread`\, n.
   A kind of plain sweet cake seasoned with ginger, and
   sometimes made in fanciful shapes. ``Gingerbread that was
   full fine.'' --Chaucer.

Source : WordNet®

gingerbread
     n : cake flavored with ginger