arrears Idiom, Proverb
in arrears|arrears
adv. phr. Late or behind in payment of money or in finishing something.

Usually used of a legal debt or formal obligation.
Poor Mr. Brown! He is in arrears on his rent. He is in arrears on the story he promised to write for the magazine.
arrears
arrears see
in arrears.
in arrears
in arrears Late or behind, especially in payment of money. For example,
He's been in arrears on his rent so often that he may be evicted. [First half of 1600s]