adjective

The definition of functional is something that is useful for its intended purpose.

A saw that works to cut things is an example of a functional saw.

## functional

- of or relating to a function or functions
- performing or able to perform a function
- useful or intended to be useful

- Med. affecting a function of some organ without apparent structural or organic changes: a
*functional*disease

## functional

adjective

- a. Of or relating to a function.b. Of, relating to, or indicating a mathematical function or functions.
- Designed for or adapted to a particular function or use:
*functional architecture.* - a. Capable of performing a function; operative:
*a functional set of brakes.*b. Able to function personally or socially despite limitations or impairment:*a functional alcoholic.* -
*Medicine*Involving physiological function rather than anatomical structure.

noun

A linear function on vectors whose values are scalars.

## functional

Adjective

(*comparative* more functional, *superlative* most functional)

- In good working order.
- Useful; serving a purpose, fulfilling a function
*That sculpture is not merely artistic, but also functional: it can be used as a hatrack.*

- Only for functional purposes, notably in architecture
*A functional construction element generally must meet higher technical but lower aesthetical requirements*

- (computing theory) Having semantics defined purely in terms of mathematical functions, without side-effects.
- (medicine) Of a disease, such that its symptoms cannot be referred to any appreciable lesion or change of structure; opposed to organic disease, in which the organ itself is affected.

Noun

(*plural* functionals)

- (mathematics) A function that takes a function as its argument; More precisely: A function
*y*=*f*(*x*) whose argument*x*varies in a space of (real valued, complex valued) functions and whose value belongs to a monodimensional space. An example: the definite integration of integrable real functions in a real interval. - (mathematics, functional analysis) A scalar-valued linear function on a vector space
- (computing) An object encapsulating a function pointer (equivalent).

Origin

*function* + *-al*