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
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.