Airfoil
Part of speech: noun
Definition: A structure shaped to produce lift when moving in air. A wing of an aircraft.
Surface
Part of speech: noun
Definition: The up-side of a flat object such as a table.The outside hull of a tangible object.The locus of an equation (especially one with exactly two degrees of freedom) in a more-than-two-dimensional space.
Part of speech: verb
Definition: To provide something with a surface.To apply a surface to something.To rise to the surface.To come out of hiding.For information or facts to become known.To work a mine near the surface.
Example sentence: If you want to know all about Andy Warhol, just look at the surface of my paintings and films and me, and there I am. There's nothing behind it.