the outer boundary of an artifact or a material layer constituting or resembling such a boundary | the inside lower horizontal surface (as of a room, hallway, tent, or other structure) |
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | a structure consisting of a room or set of rooms at a single position along a vertical scale |
a superficial aspect as opposed to the real nature of something | a large room in a exchange where the trading is done |
information that has become public | the legislative hall where members debate and vote and conduct other business |
the extended two-dimensional outer boundary of a three-dimensional object | the parliamentary right to address an assembly |
the outermost level of the land or sea | a lower limit |
| the occupants of a floor |
| the bottom surface of any lake or other body of water |
| the ground on which people and animals move about |
| the lower inside surface of any hollow structure |