Webster's Revised Unabridged Dictionary · 1913

Costly

Costly (k?st"l?; 115) , adjective

[From Cost expense.]

1.
Of great cost; expensive; dear.
He had fitted up his palace in the most costly and sumptuous style, for the accomodation of the princess. — Prescott
2.
Gorgeous; sumptuous. [Poetic.]
To show how costly summer was at hand. — Shakespeare