Surface

The exterior part of anything that has length and breadth; one of the limits that bound a solid, esp. the upper face; superficies; the outside; as, the surface of the earth; the surface of a diamond; the surface of the body.

Hence, outward or external appearance.

A magnitude that has length and breadth without thickness; superficies; as, a plane surface; a spherical surface.

That part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion.

To give a surface to; especially, to cause to have a smooth or plain surface; to make smooth or plain.

To work over the surface or soil of, as ground, in hunting for gold.

information that has become public; "all the reports were out in the open"; "the facts had been brought to the 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"

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"