Meaning of arrear

ar•rear

Pronunciation: (u-rēr'), [key]
— n.
  1. Usually,the state of being behind or late, esp. in the fulfillment of a duty, promise, obligation, or the like.
  2. Often,something overdue in payment; a debt that remains unpaid.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.