overruno·ver·run2 /ˌəʊvəˈrʌnˌoʊ-/ verb (past tensepst overran /-ˈræn/, past participlepp overrun) [intransitiveI, transitiveT]ACCOUNTINGMANUFACTURING to cost more or continue longer than expected or intendedThe health service ended up subsidising the venture because the costs overran.
Businesses refused to commit themselves in case the project’s costs overran its budget.