1.Definition: a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight

Related Noun(s):aerofoil, airfoil

Category: Objects

2.Definition: a superficial aspect as opposed to the real nature of something

"It was not what it appeared to be on the surface"

Category: General

3.Definition: information that has become public

"All the reports were out in the open", "The facts had been brought to the surface"

Related Noun(s):open

Category: General

4.Definition: 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"

Category: Places

5.Definition: 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"

Category: Objects

6.Definition: 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"

Category: Objects