*back⁴ adj 1 in the back or behind something 后面的，后部的，背后的: the back door 后门 in the back garden 在后园 2 back street/road a street or road that is away from the main streets of a town or area 小街/小马路 3 back rent/taxes/pay money that someone owes from an earlier date 拖欠的租金/税款/工资: We owe ￡350 in back rent. 我们拖欠了 350 英镑的租金。