The Collaborative International Dictionary of English v.0.48:

Carton \Car"ton\ (k[aum]r"t[o^]n), n. [F. See Cartoon.]
   Pasteboard for paper boxes; also, a pasteboard box.
   [1913 Webster]

   Carton pierre, a species of papier-mach['e], imitating
      stone or bronze sculpture. --Knight.
      [1913 Webster]

WordNet (r) 3.0 (2006):

carton
    n 1: the quantity contained in a carton [syn: carton,
         cartonful]
    2: a box made of cardboard; opens by flaps on top