Real Dictionary

surface
a price charged for some article or service; cost [...]
a substance that stimulates the production of antibodies [...]
any of a large group of nitrogenous compounds of high molecular weight that are essential constituents of all living organisms. They consist of one or more chains of amino acids linked by peptide bonds and are folded into a specific three-dimensional shap
something used for distinguishing or marking [...]
the act or an instance of transforming ideas into words [...]
the condition or quality of being resonant [...]
the exterior face of an object or one such face [...]
the sum total of plasmagenes in a cell [...]
countable noun: A work surface is a flat area, for example the top of a table, desk, or kitchen cupboard, on which you can work.
countable noun: The surface of something is the flat top part of it or the outside of it.
singular noun: When you refer to the surface of a situation, you are talking about what can be seen easily rather than what is hidden or not immediately obvious.