Definition of "Surface" :
noun: a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight
noun: the outer boundary of an artifact or a material layer constituting or resembling such a boundary
"There is a special cleaner for these surfaces."
noun: information that has become public
"The facts had been brought to the surface."
noun: a superficial aspect as opposed to the real nature of something
"It was not what it appeared to be on the surface."
noun: the extended two-dimensional outer boundary of a three-dimensional object
"They skimmed over the surface of the water."
noun: the outermost level of the land or sea
"Earthquakes originate far below the surface."
verb: appear or become visible; make a showing
"I hope the list key is going to surface again."
verb: put a coat on; cover the surface of; furnish with a surface
verb: come to the surface
adjective: on the surface
"Surface materials of the moon."