nouns
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"
is a type of (narrower)
a man-made object taken as a whole
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"
is a type of (narrower)
the line or plane indicating the limit or extent of something
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"
a superficial aspect as opposed to the real nature of something
"it was not what it appeared to be on the surface"
is a type of (narrower)
a distinct feature or element in a problem
"he studied every facet of the question"
information that has become public
"all the reports were out in the open"; "the facts had been brought to the surface"
a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight