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."