oversupply /əʊvəsəˈplʌɪ/noun 1verb 1forms 3 noun1 •An excessive supply.He does not like twisting arms, LBJ's forte, preferring the force of reason, a commodity not in over-supply in the nation's capital. — 2012 verb1 •To supply more than is needed. formsoversupplied · oversupplying · oversupplies