The Collaborative International Dictionary of English v.0.48:

Letterpress \Let"ter*press`\ (-t[~e]r*pr[e^]s`), n.
   Print; letters and words impressed on paper or other material
   by types; -- often used of the reading matter in distinction
   from the illustrations.
   [1913 Webster]

         Letterpress printing, printing directly from type, in
         distinction from printing from plates.
   [1913 Webster]

WordNet (r) 3.0 (2006):

letterpress
    n 1: printing from a plate with raised characters [syn: relief
         printing, letterpress]