Mathematics The boundary of a three-dimensional figure.
Mathematics The two-dimensional locus of points located in three-dimensional space.
Mathematics A portion of space having length and breadth but no thickness.
The superficial or external aspect: "a flamboyant, powerful confidence man who lives entirely on the surface of experience” ( Frank Conroy).
Relating to, on, or at a surface: surface algae in the water.
Relating to or occurring on or near the surface of the earth.
Apparent as opposed to real.
To provide with a surface or apply a surface to: surface a table with walnut; surface a road with asphalt.
To rise to the surface.
To emerge after concealment.
To work or dig a mine at or near the surface of the ground.
on the surface To all intents and purposes; to all outward appearances: a soldier who, on the surface, appeared brave and patriotic.