[1] : 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

[2] : WordNet (r) 2.0

costly
     adj 1: entailing great loss or sacrifice; "a dearly-won victory"
            syn: dearly-won
     2: having a high price; "costly jewelry"; "high-priced
        merchandise"; "much too dear for my pocketbook"; "a pricey
        restaurant" syn: dearp, high-priced, pricey, pricy
     also: costliest, costlier
see also:
dearly-won dearp high-priced pricey pricy costliest 
costlier 

Costly >> C Words
Costly, definition of term: Costly
costly_pag1.html

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