What is the meaning of surface?

noun

• The outer boundary of an artifact or a material layer constituting or resembling such a boundary.
  • usage: "there is a special cleaner for these surfaces"; "the cloth had a pattern of red dots on a white surface"
• The extended two-dimensional outer boundary of a three-dimensional object.
  • usage: "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.
  • usage: "earthquakes originate far below the surface"; "three quarters of the Earth's surface is covered by water"
  • synonyms: Earth's surface
• A superficial aspect as opposed to the real nature of something.
  • usage: "it was not what it appeared to be on the surface"
• Information that has become public.
  • usage: "all the reports were out in the open"; "the facts had been brought to the surface"
  • synonyms: open
• 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

verb

• Come to the surface.
  • synonyms: come up, rise up, rise
• Put a coat on; cover the surface of; furnish with a surface.
  • usage: "coat the cake with chocolate"
  • synonyms: coat
• Appear or become visible; make a showing.
  • usage: "She turned up at the funeral"; "I hope the list key is going to surface again"
  • synonyms: come on, come out, turn up, show up

adjective

• On the surface.
  • usage: "surface materials of the moon"