door door /ˈdɔr/

noun

1. () A swinging or sliding barrier that will close the entrance to a room or building or vehicle  ( door )
   a swinging or sliding barrier that will close the entrance to a room or building or vehicle
    He knocked on the door
   he knocked on the door
    He slammed the door as he left
   he slammed the door as he left
   
   
2. () The entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close  ( room access , threshold , doorway , door )
   the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
    He stuck his head in the doorway
   he stuck his head in the doorway
   
3. () Anything providing a means of access (or escape)  ( door )
   anything providing a means of access (or escape)
    We closed the door to Haitian immigrants
   we closed the door to Haitian immigrants
    Education is the door to success
   education is the door to success
   
4. A room that is entered via a door  ( door )
   a room that is entered via a door
    His office is the third door down the hall on the left
   his office is the third door down the hall on the left
   
   
5. A structure where people live or work (usually ordered along a street or road)  ( door )
   a structure where people live or work (usually ordered along a street or road)
    The office next door
   the office next door
    They live two doors up the street from us
   they live two doors up the street from us