door
noun
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a swinging or sliding barrier that will close the entrance to a room or building or vehicle“I knocked on the door.”
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a room that is entered via a door“My office is the third door down the hall on the left.”
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a structure where people live or work, usually ordered along a street or road“We often go to lunch with the workers from the office next door.”
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the entrance (the space in a wall) through which you enter or leave a room or building“the space that a door can close”doorwayroom accessthreshold
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anything providing a means of access (or escape)“we closed the door to Haitian immigrants”