interface (Noun) — (chemistry) a surface forming a common boundary between two things (two objects, liquids or chemical phases).
interface (Noun) — (computing) a program that controls a display for the user (usually on a computer monitor) and that allows the user to interact with the system.
interface (Noun) — The overlap where two theories or phenomena affect each other or have links with each other. ex. "the interface between chemistry and biology"
interface (Noun) — (computing) computer circuit consisting of the hardware and associated circuitry that links one device with another (especially a computer and a hard disk drive or other peripherals).
interface (Verb) — (computing) to connect with an interface.
interface (Verb) — Interact. ex. "I think you should try to interface with sales department"