1. not yet paid or settled
2. working without receiving payment

Examples

• She has several unpaid bills on her desk.
• The company still has unpaid invoices from last month.
• He works as an unpaid intern at the law firm.
• Many unpaid volunteers helped with the charity event.
• The unpaid debt has been growing with interest.
• She took unpaid leave to care for her sick mother.
• The organization relies on unpaid staff members.