[syn: costly, dear(p), high-priced, pricey, pricy]
The Collaborative International Dictionary of English v.0.48:
Costly \Cost"ly\ (k?st"l?; 115), a. [From Cost expense.]
   [1913 Webster]
   1. Of great cost; expensive; dear.
      [1913 Webster]
            He had fitted up his palace in the most costly and
            sumptuous style, for the accomodation of the
            princess.                             --Prescott.
      [1913 Webster]
   2. Gorgeous; sumptuous. [Poetic.]
      [1913 Webster]
            To show how costly summer was at hand. --Shak.
      [1913 Webster]
WordNet (r) 3.0 (2006):
costly
    adj 1: entailing great loss or sacrifice; "a dearly-won victory"
           [syn: dearly-won, costly]
    2: having a high price; "costly jewelry"; "high-priced
       merchandise"; "much too dear for my pocketbook"; "a pricey
       restaurant" [syn: costly, dear(p), high-priced,
       pricey, pricy]