The Collaborative International Dictionary of English v.0.48:

Repouss'e \Re*pous`s['e]"\ (re -p??`s?"), a. [F., p. p. of
   repousser to thrust back; pref re- + pousser to push. See
   Push.]
   (a) Formed in relief, as a pattern on metal.
   (b) Ornamented with patterns in relief made by pressing or
       hammering on the reverse side; -- said of thin metal, or
       of a vessel made of thin metal. -- n. Repouss['e] work.
       [1913 Webster]

   Repouss['e] work, ornamentation of metal in relief by
      pressing or hammering on the reverse side.
      [1913 Webster]