1. (noun)door a swinging or sliding barrier that will close the entrance to a room or building or vehicle Synonyms: room access, threshold, doorway
2. (noun)doorway, door, room access, threshold the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close Synonyms: verge, doorsill, brink, doorstep, doorway, limen, threshold, room access, door
3. (noun)door anything providing a means of access (or escape) Synonyms: room access, threshold, doorway
4. (noun)door a structure where people live or work (usually ordered along a street or road) Synonyms: room access, threshold, doorway
5. (noun)door a room that is entered via a door Synonyms: room access, threshold, doorway