1》 the outside part or uppermost layer of something.
↘(also ~ area ) the area of this.
2》 the upper limit of a body of liquid.
3》 outward appearance as distinct from less obvious aspects.
4》 Geometry a set of points that has length and breadth but no thickness.
■ adjective relating to or occurring on the ~.
↘carried by or denoting transportation by sea or overland as contrasted with by air.
1》 rise or come up to the ~.
2》 become apparent.
3》 provide (something, especially a road) with a particular ~.
4》 informal appear after having been asleep.
C17: from Fr. (see sur- 1 , face ), suggested by L. superficies .