| diseconomy diseconomy /; AmE / noun [C, usually pl., U] (plural diseconomies) (Economics ) a financial or economic disadvantage such as increases in cost; sth that produces an increase in cost: Urban diseconomies are the financial and social burdens arising from location in a major urban area. Further demands on such areas may actually begin to produce diseconomies in the form of increased congestion and ‘overheating'. |