a door consisting of four orthogonal partitions that rotate about a central pivot; a door designed to equalize the air pressure in tall buildings | a swinging or sliding barrier that will close the entrance to a room or building or vehicle |
an organization or institution with a high rate of turnover of personnel or membership | the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close |
| a room that is entered via a door |
| a structure where people live or work (usually ordered along a street or road) |
| anything providing a means of access (or escape) |