adj. Of or pertaining to the surface of something.
The Century Dictionary and Cyclopedia
Of or pertaining to a surface; superficial; in geology, relating to the phenomena of the land-surface, especially to the unconsolidated materials (drift, rock-waste) of the land-surface.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adj. pertaining to or occurring on or near the earth's surface
Word Usage
"Robert won by correctly spelling "surficial," defined as "of or relating to the boundary or portion of the boundary of a three-dimensional region and especially that of the earth.""