#ceiling  the overhead upper surface of a room; "he hated painting the ceiling"
  supertype:  #upper_surface__uppersurface  the side that is uppermost
  subtype:  #overhead  (nautical) the top surface of an enclosed space on a ship
  part of:  #hallway__hall  an interior passage or corridor onto which rooms open; "the elevators were at the end of the hall"
  part of:  #room  an area within a building enclosed by walls and floor and ceiling; "the rooms were very small but they had a nice view"
     part of:  #edifice__building  a structure that has a roof and walls and stands more or less permanently in one place; "there was a three-story building on the corner"; "it was an imposing edifice"

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