The Collaborative International Dictionary of English v.0.48:

Stationery \Sta"tion*er*y\ (-[e^]r*[y^]), n.
   The articles usually sold by stationers, as paper, pens, ink,
   quills, blank books, etc.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Stationery \Sta"tion*er*y\, a.
   Belonging to, or sold by, a stationer.
   [1913 Webster]

WordNet (r) 3.0 (2006):

stationery
    n 1: paper cut to an appropriate size for writing letters;
         usually with matching envelopes [syn: stationery, letter
         paper]