The Collaborative International Dictionary of English v.0.48:

Door \Door\, n. [OE. dore, dure, AS. duru; akin to OS. dura,
   dor, D. deur, OHG. turi, door, tor gate, G. th["u]r, thor,
   Icel. dyrr, Dan. d["o]r, Sw. d["o]rr, Goth. daur, Lith.
   durys, Russ. dvere, Olr. dorus, L. fores, Gr. ?; cf. Skr.
   dur, dv[=a]ra. [root]246. Cf. Foreign.]
   1. An opening in the wall of a house or of an apartment, by
      which to go in and out; an entrance way.
      [1913 Webster]

            To the same end, men several paths may tread,
            As many doors into one temple lead.   --Denham.
      [1913 Webster]

   2. 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.
      [1913 Webster]

            At last he came unto an iron door
            That fast was locked.                 --Spenser.
      [1913 Webster]

   3. Passage; means of approach or access.
      [1913 Webster]

            I am the door; by me if any man enter in, he shall
            be saved.                             --John x. 9.
      [1913 Webster]

   4. An entrance way, but taken in the sense of the house or
      apartment to which it leads.
      [1913 Webster]

            Martin's office is now the second door in the
            street.                               --Arbuthnot.
      [1913 Webster]

   Blank door, Blind door, etc. (Arch.) See under Blank,
      Blind, etc.

   In doors, or Within doors, within the house.

   Next door to, near to; bordering on.
      [1913 Webster]

            A riot unpunished is but next door to a tumult.
                                                  --L'Estrange.


   Out of doors, or Without doors, and, [colloquially], Out
   doors, out of the house; in open air; abroad; away; lost.
      [1913 Webster]

            His imaginary title of fatherhood is out of doors.
                                                  --Locke.

   To lay (a fault, misfortune, etc.) at one's door, to charge
      one with a fault; to blame for.

   To lie at one's door, to be imputable or chargeable to.
      [1913 Webster]

            If I have failed, the fault lies wholly at my door.
                                                  --Dryden.
      [1913 Webster]

   Note: Door is used in an adjectival construction or as the
         first part of a compound (with or without the hyphen),
         as, door frame, doorbell or door bell, door knob or
         doorknob, door latch or doorlatch, door jamb, door
         handle, door mat, door panel.
         [1913 Webster]

WordNet (r) 3.0 (2006):

door
    n 1: a swinging or sliding barrier that will close the entrance
         to a room or building or vehicle; "he knocked on the door";
         "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;
       "he stuck his head in the doorway" [syn: doorway, door,
       room access, threshold]
    3: anything providing a means of access (or escape); "we closed
       the door to Haitian immigrants"; "education is the door to
       success"
    4: a structure where people live or work (usually ordered along
       a street or road); "the office next door"; "they live two
       doors up the street from us"
    5: a room that is entered via a door; "his office is the third
       door down the hall on the left"

Moby Thesaurus II by Grady Ward, 1.0:

79 Moby Thesaurus words for "door":
   French door, access, adit, admission, admittance, archway, avenue,
   back door, barway, blowhole, bulkhead, carriage entrance,
   cellar door, cellarway, channel, chute, debouch, doorjamb,
   doorpost, doorway, egress, emunctory, entrance, entranceway,
   entree, entry, entryway, escape, estuary, exhaust, exit, floodgate,
   flume, front door, gate, gatepost, gateway, hatch, hatchway,
   ingress, lintel, loophole, opening, out, outcome, outfall, outgate,
   outgo, outlet, porch, pore, port, portal, porte cochere, postern,
   propylaeum, pylon, sally port, scuttle, side door, sluice,
   spiracle, spout, stile, storm door, tap, threshold, tollgate, trap,
   trap door, turnpike, turnstile, vent, ventage, venthole, vomitory,
   way, way out, weir



Bouvier's Law Dictionary, Revised 6th Ed (1856):

DOOR. The place of usual entrance in a house, or into a room in the house.
     2. To authorize the breach of an outer door in order to serve process,
the process must be of a criminal nature; and even then a demand of
admittance must first have been refused. 5 Co. 93; 4 Leon. 41; T. Jones,
234; 1 N. H. Rep. 346; 10 John. 263; 1 Root, 83 , 134; 21 Pick. R. 156. The
outer door may also be broken open for the purpose of executing a writ of
habere facias. 5 Co. 93; Bac. Ab. Sheriff, N. 3.
     3. An outer door cannot in general be broken for the purpose of serving
civil process; 13 Mass. 520; but after the defendant has been arrested, and
he takes refuge in his own house, the officer may justify breaking an outer
door to take him. Foster, 320; 1 Roll. R. 138; Cro. Jac. 555.; 10 Wend. 300;
6 Hill, N. Y. Rep. 597. When once an officer is in the house, he may break
open an inner door to make an arrest. Kirby, 386 5 John. 352; 17 John. 127,
See 1 Toull. n. 214, p. 88.



U.S. Gazetteer Counties (2000):

Door -- U.S. County in Wisconsin
   Population (2000):    27961
   Housing Units (2000): 19587
   Land area (2000):     482.718703 sq. miles (1250.235648 sq. km)
   Water area (2000):    1887.109352 sq. miles (4887.590577 sq. km)
   Total area (2000):    2369.828055 sq. miles (6137.826225 sq. km)
   Located within:       Wisconsin (WI), FIPS 55
   Location:             44.966330 N, 87.290784 W
   Headwords:
    Door
    Door, WI
    Door County
    Door County, WI