The Collaborative International Dictionary of English v.0.48:

Gree \Gree\, n.; pl. Grees (gr[=e]z); obs. plurals Greece
   (gr[=e]s) Grice (gr[imac]s or gr[=e]s), Grise, Grize
   (gr[imac]z or gr[=e]z), etc. [OF. gr['e], F. grade. See
   Grade.]
   A step.
   [1913 Webster]