Definitions
1.NounA portal of entry into a building, room, or vehicle, typically consisting of a rigid plane movable on a hinge. It may have a handle to help open and close, a latch to hold it closed, and a lock that ensures it cannot be opened without a key."I knocked on the vice president's door.; That's the door to the bathroom.; bathroom door, bedroom door, doorkey, exterior door, interior door"
2.NounA building with a door, especially a house."His house is three doors down.; He went five doors up the road to the bank."
3.NounAny flap, etc., that opens like a door."the 24 doors in an Advent calendar; cupboard door"
4.NounAn entry point.
5.NounA means of approach or access."Learning is the door to wisdom."
6.NounA possibility."to leave the door open; all doors are open to somebody"
7.NounA barrier."Keep a door on your anger."
8.NounA software mechanism by which a user can interact with a program running remotely on a bulletin board system. See BBS door.
9.NounThe proceeds from entrance fees and/or ticket sales at a venue such as a bar or nightclub, especially in relation to portion paid to the entertainers."The bar owner gives each band a percentage of the door and charges customers more to get in."
10.VerbTo cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.