Main Entry: cost·ly

Pronunciation: \ˈkȯs(t)-lē\

Function: adjective

Inflected Form(s): cost·li·er; cost·li·est

Date: 14th century

1 a : commanding a high price especially because of intrinsic worth <costly gems> b : rich, splendid
2 : made or done at heavy expense or sacrifice <a costly mistake>

— cost·li·ness noun