the outer boundary of an artifact or a material layer constituting or resembling such a boundary | an act of delaying or interrupting the continuity |
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight | a narrow opening |
a superficial aspect as opposed to the real nature of something | a conspicuous disparity or difference as between two figures |
information that has become public | a difference (especially an unfortunate difference) between two opinions or two views or two situations |
the extended two-dimensional outer boundary of a three-dimensional object | an open or empty space in or between things |
the outermost level of the land or sea | a pass between mountain peaks; geomorphological term for the lowest point on a mountain ridge between two peaks |