#geometrydash #robtop #anotherandomwheelguy #hard #extremedemon Noun edit interface (plural interfaces) The point of interconnection or contact between entities. Public relations firms often serve as the interface between a company and the press. (chemistry, physics) A thin layer or boundary between different substances or two phases of a single substance. If water and oil are mixed together, they tend to separate, and at equilibrium they are in different strata with an oil-water interface in be