Ar‐rear″, n. That which is behind in payment, or which remains unpaid, though due; esp. a remainder, or balance which remains due when some part has been paid; arrearage; — commonly used in the plural, as, arrears of rent, wages, or taxes. Locke.
For much I dread due payment by the Greeks
Of yesterday's arrear.
Cowper.
I have a large arrear of letters to write.
J. D. Forbes.
In arrearorIn arrears, behind; backward; behindhand; in debt.