wastage Syllabification: (wast·age)Pronunciation: /ˈwāstij/Translate wastage | into French | into Italian | into Spanish Definition of wastage noun 1the action or process of losing or destroying something by using it carelessly or extravagantly:the wastage of natural resources the amount of something lost or destroyed by carelessness:wastage was cut by 50 percent 2the weakening or deterioration of a part of the body, typically as a result of illness or lack of use:the wastage of muscle tissuewastage in other Oxford dictionaries Definition of wastage in the British & World English dictionary