a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight Synonyms: airfoil, aerofoil, control surface,
the outer boundary of an artifact or a material layer constituting or resembling such a boundary; "there is a special cleaner for these surfaces"; "the cloth had a pattern of red dots on a white surface"
information that has become public; "all the reports were out in the open"; "the facts had been brought to the surface" Synonyms: open,
a superficial aspect as opposed to the real nature of something; "it was not what it appeared to be on the surface"
the extended two-dimensional outer boundary of a three-dimensional object; "they skimmed over the surface of the water"; "a brush small enough to clean every dental surface"; "the sun has no distinct surface"
the outermost level of the land or sea; "earthquakes originate far below the surface"; "three quarters of the Earth''s surface is covered by water" Synonyms: Earth''s surface,