() visiting all the homes or offices in an area, especially to try to sell sth （尤指设法推销某物）挨家挨户，上门◆They sell household goods door to door and through catalogues. 他们通过上门推销和寄送商品目录来销售家庭用品。
if sth is delivered door to door, it is brought directly from the factory or supplier to the customer 送货上门；按户送达◆We deliver door to door anywhere in the US. 我们送货上门到美国的任何地点。
▸ˌdoor-to-ˈdoor
adjective
[] ◆a door-to-door salesman/sales force 上门推销员／销售人员◆door-to-door package delivery 上门包裹投递