A portal of entry into a building, room, or vehicle, typically consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed, and a lock that ensures the door cannot be opened without the key.
An entry point.
A barrier.
A means of approach or access.
Any flap, etc. that opens like a door.
A possibility.
The 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"
To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.
A set of locks (enclosed sections of waterway) mounted one above the next.
A flight of stairs; a stairway.
A connected set of flights of stairs; a stairwell.
To modify (a signal, a graph, etc.) to reduce a smooth curve to a series of discrete steps.
To increase one's share in a co-ownership.