- a person who is in debt or under financial obligation to another (opposed to creditor).
- a person or commercial enterprise that owes a financial obligationCompare creditor
early 13c., dettur, dettour, from Old French detour, from Latin debitor “a debter,” from past participle stem of debere; see debt. The -b- was restored in later French, and in English c.1560-c.1660. The KJV has detter three times, debter three times, debtor twice and debtour once.