The Collaborative International Dictionary of English v.0.48:

Floor \Floor\ (fl[=o]r), n. [AS. fl[=o]r; akin to D. vloer, G.
   flur field, floor, entrance hall, Icel. fl[=o]r floor of a
   cow stall, cf. Ir. & Gael. lar floor, ground, earth, W.
   llawr, perh. akin to L. planus level. Cf. Plain smooth.]
   1. The bottom or lower part of any room; the part upon which
      we stand and upon which the movables in the room are
      supported.
      [1913 Webster]

   2. The structure formed of beams, girders, etc., with proper
      covering, which divides a building horizontally into
      stories. Floor in sense 1 is, then, the upper surface of
      floor in sense 2.
      [1913 Webster]

   3. The surface, or the platform, of a structure on which we
      walk or travel; as, the floor of a bridge.
      [1913 Webster]

   4. A story of a building. See Story.
      [1913 Webster]

   5. (Legislative Assemblies)
      (a) The part of the house assigned to the members.
      (b) The right to speak; as, the gentleman from Iowa has
          the floor. [U.S.]
          [1913 Webster]

   Note: Instead of he has the floor, the English say, he is in
         possession of the house.
         [1913 Webster]

   6. (Naut.) That part of the bottom of a vessel on each side
      of the keelson which is most nearly horizontal.
      [1913 Webster]

   7. (Mining)
      (a) The rock underlying a stratified or nearly horizontal
          deposit.
      (b) A horizontal, flat ore body. --Raymond.
          [1913 Webster]

   Floor cloth, a heavy fabric, painted, varnished, or
      saturated, with waterproof material, for covering floors;
      oilcloth.

   Floor cramp, an implement for tightening the seams of floor
      boards before nailing them in position.

   Floor light, a frame with glass panes in a floor.

   Floor plan.
      (a) (Shipbuilding) A longitudinal section, showing a ship
          as divided at the water line.
      (b) (Arch.) A horizontal section, showing the thickness of
          the walls and partitions, arrangement of passages,
          apartments, and openings at the level of any floor of
          a house.
          [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Floor \Floor\, v. t. [imp. & p. p. Floored; p. pr. & vb. n.
   Flooring.]
   1. To cover with a floor; to furnish with a floor; as, to
      floor a house with pine boards.
      [1913 Webster]

   2. To strike down or lay level with the floor; to knock down;
      hence, to silence by a conclusive answer or retort; as, to
      floor an opponent.
      [1913 Webster]

            Floored or crushed by him.            --Coleridge.
      [1913 Webster]

   3. To finish or make an end of; as, to floor a college
      examination. [Colloq.]
      [1913 Webster]

            I've floored my little-go work.       --T. Hughes.
      [1913 Webster]

WordNet (r) 3.0 (2006):

floor
    n 1: the inside lower horizontal surface (as of a room, hallway,
         tent, or other structure); "they needed rugs to cover the
         bare floors"; "we spread our sleeping bags on the dry floor
         of the tent" [syn: floor, flooring]
    2: a structure consisting of a room or set of rooms at a single
       position along a vertical scale; "what level is the office
       on?" [syn: floor, level, storey, story]
    3: a lower limit; "the government established a wage floor"
       [syn: floor, base]
    4: the ground on which people and animals move about; "the fire
       spared the forest floor"
    5: the bottom surface of any lake or other body of water
    6: the lower inside surface of any hollow structure; "the floor
       of the pelvis"; "the floor of the cave"
    7: the occupants of a floor; "the whole floor complained about
       the lack of heat"
    8: the parliamentary right to address an assembly; "the chairman
       granted him the floor"
    9: the legislative hall where members debate and vote and
       conduct other business; "there was a motion from the floor"
    10: a large room in a exchange where the trading is done; "he is
        a floor trader" [syn: floor, trading floor]
    v 1: surprise greatly; knock someone's socks off; "I was floored
         when I heard that I was promoted" [syn: shock, floor,
         ball over, blow out of the water, take aback]
    2: knock down with force; "He decked his opponent" [syn: deck,
       coldcock, dump, knock down, floor]