Definition of interfaces:
(n) :
(computing) The point of interconnection between systems or subsystems.
(n) :
(computing) The connection between a user and a machine.
(n) :
The point of interconnection or contact between entities.
(n) :
(object-oriented programming) The connection between parts of software; also the public or published sections of an object or module.
(n) :
(object-oriented programming) In object-oriented programming, a piece of code defining a set of operations that other code must implement.
(n) :
(object-oriented programming) In some languages, a block of code declaring the interface (point of interconnection) between a class and code that interacts with it.