From Wikipedia, the free encyclopedia: **Closure (computer science)**
> In computer science, a closure is a
> function that is evaluated in an
> environment containing one or more
> bound variables. When called, the
> function can access these variables.
> The explicit use of closures is
> associated with functional programming
> and with languages such as ML and
> Lisp. Constructs such as objects in
> other languages can also be modeled
> with closures.