In object-oriented computing, a method is a function (proc) that is bound to a particular object (a class or instance). A method might be bound to an object when the object is created, or only when the method is invoked (late binding). The name "method" conveys that the function provides a way to perform some operation on the resource that an object encapsulates. An object should represent the encapsulated resource, and each method should operate exclusively on the encapsulated resource, not on resources found in the environment or provided as arguments.
method is a command available inside object definition contexts in various OO extensions: