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, splendid2: made or done at heavy expense or sacrifice <a costly mistake>

— cost·li·ness noun