what is surface
surface noun (APPEARANCE) B2 [ S ] The surface of a situation or person is what they appear to be, or the features they have that are not hidden or difficult to see: On the surface, this seems like a difficult problem, but in fact there's an easy solution to it.
surface noun (TOP) 1  B2 [ C ] the outer or top part or layer of something: âº [ 2  C ] the top layer of a field or track on which sports are played: âº [ 3  C ] the flat top part of a table, cupboard, etc.: 4  B2 [ S ] The surface of a situation or person is what they appear to be, or the features they have that are not hidden or difficult to see: On the surface, this seems like a difficult problem, but in fact there's an easy solution to it.