What is the meaning of Door?

A 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.

Any flap, etc. that opens like a door.

An entry point.

A means of approach or access.

A possibility.

A barrier.

A software mechanism by which a user can interact with a program running remotely on a bulletin board system. See BBS door.

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.

To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.

through

across, around (within a certain space)

because of, due to

by, by means of

through

forward, on

through (implying motion)

across, around (within a certain space)

throughout, round (occurring all the time – constantly or frequently – within a certain time period)

fool, moron

pain

door

to choose

Source: wiktionary.org