the outer boundary of an artifact or a material layer constituting or resembling such a boundary | any spherically shaped artifact |
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | a particular aspect of life or activity |
a superficial aspect as opposed to the real nature of something | the geographical area in which one nation is very influential |
information that has become public | the apparent surface of the imaginary sphere on which celestial bodies appear to be projected |
the extended two-dimensional outer boundary of a three-dimensional object | a solid figure bounded by a spherical surface (including the space it encloses) |
the outermost level of the land or sea | a three-dimensional closed surface such that every point on the surface is equidistant from the center |
| a particular environment or walk of life |