A person or firm that owes money; one in debt; one who owes a debt
"The debtor was required to repay the loan within thirty days."
In plain English: A debtor is someone who owes money to another person or company and has not yet paid it back.
"The debtor promised to pay back his loan within three months."
Usage: Use debtor to refer specifically to the individual or entity owing money, distinguishing it from creditor. This term applies whether referring to a single person or a business organization with outstanding financial obligations.
The word "debtor" comes from the Latin term debitus, meaning one who owes a debt. It entered Middle English through French and eventually replaced an older, now obsolete form in the language.