<p><strong>Noun:</strong></p><ul><li>a surface regarded as the common boundary of two bodies, spaces, or phases.</li><li>the facts, problems, considerations, theories, practices, etc., shared by two or more disciplines, procedures, or fields of study: the interface between chemistry and physics.</li><li>a common boundary or interconnection between systems, equipment, concepts, or human beings.</li><li>communication or interaction: Interface between the parent company and its subsidiaries has never been better.</li><li>a thing or circumstance that enables separate and sometimes incompatible elements to coordinate effectively: The organization serves as an interface between the state government and the public.</li><li>computer hardware or software designed to communicate information between hardware devices, between software programs, between devices and programs, or between a device and a user.</li></ul><p><strong>Verb (used with object):</strong></p><ul><li>to bring into an interface.</li><li>to bring together; connect or mesh: The management is interfacing several departments with an information service from overseas.</li></ul><p><strong>Verb (used without object):</strong></p><ul><li>to be in an interface.</li><li>to function as an interface.</li><li>to meet or communicate directly; interact, coordinate, synchronize, or harmonize (often followed by with): The two communications systems are able to interface with each other.</li></ul>