adjective, cost·li·er, cost·li·est.
Origin of costly
Examples from the Web for costlier
As Bilmes reports, the Iraq and Afghanistan wars are at least 25 percent costlier than previous projections.
And on Friday, an Iowa ethanol producer said that the spill proves that oil production has become “costlier and riskier.”
They only wear their costlier dresses on the occasions of their going to court or when they pay ceremonial visits.The Human Race|Louis Figuier
Though he rarely bought wine, he often bought a costlier drink—laudanum, for his own drinking.The Real Shelley, Vol. I (of 2)|John Cordy Jeaffreson
It was not that his dress, although a uniform, was better or costlier than theirs.The Duke of Stockbridge|Edward Bellamy
The silk we employ for our costlier fabrics is of the kind which we import from Piedmont and the southern provinces of France.The Arts and Crafts of Older Spain, Volume III (of 3)|Leonard Williams
The increased use of linen paper in place of the costlier parchment helped in the popularization of letters.History of the English People, Volume III (of 8)|John Richard Green