The Collaborative International Dictionary of English v.0.48:

Papier-mach'e \Pa`pier"-ma`ch['e]"\, n. [F. papier m[^a]ch['e],
   lit., chewed or mashed paper.]
   A hard and strong substance made of a pulp from paper, mixed
   with size or glue, etc. It is formed into various articles,
   usually by means of molds.
   [1913 Webster]