from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A movable structure used to close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates.
- n. A similar part on a piece of furniture or a vehicle.
- n. A doorway.
- n. The room or building to which a door belongs: They live three doors down the hall.
- n. A means of approach or access: looking for the door to success.
- transitive v. Slang To strike (a passing bicyclist, for example) by suddenly opening a vehicular door.
- transitive v. To serve as a doorman or doorwoman of (a nightclub, for example).
- idiom at (someone's) door As a charge holding someone responsible: You shouldn't lay the blame for the fiasco at her door.
- idiom close To refuse to allow for the possibility of: The secretary of state closed the door on future negotiations.
- idiom leave the door open To allow for the possibility of: Let's leave the door open for future stylistic changes.
- idiom show (someone) the door Informal To eject (someone) from the premises.
- idiom show (someone) the door Informal To terminate the employment of; fire.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A portal of entry into a building or room, consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed, and a lock that ensures the door cannot be opened without the key.
- n. Any flap, etc. that opens like a door.
- n. A non-physical entry into the next world, a particular feeling, a company, etc.
- n. A software mechanism by which a user can interact with a program running remotely on a bulletin board system.
- v. To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian.
from the GNU version of the Collaborative International Dictionary of English
- n. An opening in the wall of a house or of an apartment, by which to go in and out; an entrance way.
- 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.
- n. Passage; means of approach or access.
- n. An entrance way, but taken in the sense of the house or apartment to which it leads.
from The Century Dictionary and Cyclopedia
- n. A movable barrier of wood, metal, stone, or other material, consisting sometimes of one piece, but generally of several pieces framed together, commonly placed on hinges, for closing a passage into a building, room, or other inclosure.
- n. An opening for passage into or out of a building or any apartment of it, or any inclosure; a doorway.
- n. Hence—3. An exterior or public entrance-way, or the house or apartment to which it leads.
- n. Avenue; passage; means of approach or access, or of exit: commonly in figurative uses: as, the door of reconciliation; a door of escape.
- n. Near to; bordering on; very nearly.
- n. Hence, figuratively, quite gone; no more to be found; lost; irrelevant.
- n. Figuratively, to ruin one.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a swinging or sliding barrier that will close the entrance to a room or building or vehicle
- n. a structure where people live or work (usually ordered along a street or road)
- n. a room that is entered via a door
- n. anything providing a means of access (or escape)
- n. the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close
Middle English dor, from Old English duru, dor.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Middle English dore, dor, from Old English duru ("door"), dor ("gate"), from Proto-Germanic *durz, from Proto-Indo-European *dʰwer-, *dʰwor- (“doorway, door, gate”). Cognates include West Frisian doar, Dutch deur, German Tür ("door"), Tor ("gate"), Danish dør, Icelandic dyr, Latin foris, Modern Greek θύρα (thýra), Albanian derë pl. dyer, Kurdish derge (der), derî, Persian در (dar), Russian дверь (dver’), Hindustani द्वार (dvār) / دوار (dvār), Armenian դուռ (duṙ), Irish doras, Lithuanian durys. (Wiktionary)