Cost"ly (k?st"l?; 115), a. [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.
Shak.
© Webster 1913.