the exterior part of anything that has length and breadth; one of the limits that bound a solid, esp. the upper face; superficies; the outside; as, the surface of the earth; the surface of a diamond; the surface of the body.-hence, outward or external appearance.-a magnitude that has length and breadth without thickness; superficies; as, a plane surface; a spherical surface.-that part of the side which is terminated by the flank prolonged, and the angle of the nearest bastion.-to give a surface to; especially, to cause to have a smooth or plain surface; to make smooth or plain.-to work over the surface or soil of, as ground, in hunting for gold.