indicator that establishes the horizontal when a bubble is centered in a tube of liquid | the outer boundary of an artifact or a material layer constituting or resembling such a boundary |
a structure consisting of a room or set of rooms at a single position along a vertical scale | a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight |
a flat surface at right angles to a plumb line | a superficial aspect as opposed to the real nature of something |
a position on a scale of intensity or amount or quality | information that has become public |
height above ground | the extended two-dimensional outer boundary of a three-dimensional object |
an abstract place usually conceived as having depth | the outermost level of the land or sea |
a specific identifiable position in a continuum or series or especially in a process | |
a relative position or degree of value in a graded group | |