a hinged, sliding, or revolving barrier at the entrance to a building, room, or vehicle, or in the framework of a cupboard, door, gate, entrance, doorway

to knock at a door

close or shut the door, block the access, end a process

close a door with bricks

close the door without bolting

secret or hidden door, a private or secret door, a trap-door, back door

gate used for entering a building, etc., entryway

inauspicious door, graveyard

a doorway

go to court for justice

all time available