unpaidun‧paid /ˌʌnˈpeɪd◂/ adjective Word Family: noun: pay, payment, repayment, payer, payee; verb: pay, repay, underpay ≠ overpay; adjective: paid ≠ unpaid, underpaid ≠ overpaid, payable1. an unpaid bill or debt has not been paid2. done without receiving payment: unpaid work unpaid leave