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English definition of “costly”

costly

adjective (EXPENSIVE)    /ˈkɒst.li/ US  /ˈkɑːst-/
expensive : a costly item a costly purchase disapproving The project was subject to several costly delays / setbacks .Expensive and luxuriousCosting too muchCosting too muchExpensive and luxurious costliness     /-nəs/ noun [U] Costing too muchExpensive and luxuriousExpensive and luxuriousCosting too much
(Definition of costly adjective (EXPENSIVE) from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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