|1.||a. a hinged or sliding panel for closing the entrance to a room, cupboard, etc|
|b. (in combination): doorbell; doorknob|
|2.||a doorway or entrance to a room or building|
|3.||a means of access or escape: a door to success|
|4.||lay at someone's door to lay (the blame or responsibility) on someone|
|5.||out of doors in or into the open air|
|6.||show someone the door to order someone to leave|
|[Old English duru; related to Old Frisian dure, Old Norse dyrr, Old High German turi, Latin forēs, Greek thura]|
"A door is what a dog is perpetually on the wrong side of." [Ogden Nash]First record of dooryard is c.1764, Amer.Eng.; doorstep is from 1810.
leave the door open
Allow for further action or discussion. For example, This will's terms leave the door open for fighting among the heirs. This metaphoric expression transfers the invitation implied by an open door to future events. Also see open the door to.