Possible Definitions:
1. Door (n.) An opening in the wall of a house or of an apartment, by which to go in and out; an entrance way.
2. Door (n.) The frame or barrier of boards, or other material, usually turning on hinges, by which an entrance way into a house or apartment is closed and opened.
3. Door (n.) Passage; means of approach or access.
4. Door (n.) An entrance way, but taken in the sense of the house or apartment to which it leads.
