costingPronunciation: /ˈkɒstɪŋ/Translate costing | into Italian Definition of costing noun (often costings) the proposed or estimated cost of producing or undertaking something:he obtained costings for manual keyboarding of the records [mass noun] the process of calculating a costing:detailed costing can make the difference between an excellent idea and a ruinous onecosting in other Oxford dictionaries Definition of costing in the US English dictionary