1
general::
1. Calling at each house, apartment, store, etc. in an area, in order to deliver, sell, or ask for something. For example, We were asked to go door to door to collect enough signatures. [c. 1900] 2. Sent from a place of origin or pickup to a place of delivery. For example, They quoted me a price for door to door, as well as a lower one if I would pick up the goods myself. This usage is nearly always applied to a shipment of merchandise.
American Heritage Idioms
2
general::
Phrase(s): door-to-door
1. Lit. having to do with movement from one door to another or from one house to another. • John is a door-to-door salesman. • We spent two weeks making a door-to-door survey. 2. Fig. by moving from one door to another or one house to another. • Anne is selling books door-to-door. • We went door-to-door, collecting money.
McGrawhill's American Idioms And Phrasal Verbs