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. [
1913 Webster]
"For much I dread due payment by the Greeks
Of yesterday's arrear."
[1913 Webster]
"I have a large arrear of letters to write."
[1913 Webster]