ALL meanings of arrear
ar·rears
A a - idioms arrear in arrears, behind or late, especially in payment: She was three months in arrears on her mortgage and credit card payments. Also, Chiefly Law, in arrear. 1
- noun arrear (obsolete) Towards the rear, backwards. (14th-16th c.). 1
- noun arrear Work to be done, obligation. 0
- noun arrear Unpaid debt. 0
- adverb arrear (Obsolete (No longer in use)) Behind time; overdue. 0