|Noah Webster's Dictionary|
(n.) The quality of being costly; expensiveness; sumptuousness.
Int. Standard Bible Encyclopedia
kost'-li-nes (timiotes, "preciousness," "an abundance of costly things"): Found only in Revelation 18:19, "made rich by reason of her costliness."
Costliness (1 Occurrence)
Revelation 18:19 And they cast dust on their heads, and cried, weeping and wailing, saying, Alas, alas that great city, wherein were made rich all that had ships in the sea by reason of her costliness! for in one hour is she made desolate. (KJV ASV DBY YLT)