the exterior or upper boundary or layer of something an object or body

the area of a surface

the uppermost level of a body of liquid

swam up to the surface

the external or superficial aspect of something

in geometry, a plane or curved two-dimensional set of points, e.g. the boundary of a three-dimensional region

of or, located on, or designed for use at the surface of something

situated or employed on the surface of the earth

miners and surface workers

to come or bring to the surface, esp of water

to become apparent

We were waiting for the next scandal to surface

to give a surface to

informal to wake up or get out of bed

He never surfaces before ten

to give a surface to (something)

to apply the surface layer to (e.g. a road)

to bring (e.g. a submarine) to the surface