Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • adj. Of or relating to a function.
  • adj. Of, relating to, or indicating a mathematical function or functions.
  • adj. Designed for or adapted to a particular function or use: functional architecture.
  • adj. Capable of performing; operative: a functional set of brakes.
  • adj. Pathology Involving functions rather than a physiological or structural cause.
  • n. A linear function on vectors whose values are scalars.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. In good working order.
  • adj. Useful; serving a purpose, fulfilling a function
  • adj. Only for functional purposes, notably in architecture
  • adj. Having semantics defined purely in terms of mathematical functions, without side-effects.
  • adj. 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.
  • n. 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.
  • n. (functional analysis) A scalar-valued linear function on a vector space
  • n. An object encapsulating a function pointer (or equivalent).

from the GNU version of the Collaborative International Dictionary of English

  • adj. Pertaining to, or connected with, a function or duty; official.
  • adj. Pertaining to the function of an organ or part, or to the functions in general; involving or affecting function rather than physiology. See functional disease, below.
  • adj. Designed for or capable of a particular function or use.
  • adj. Fit or ready for use or service; useable; in working order. Antonym of out of order and nonfunctional.
  • adj. Designed to emphasize practical utility rather than artistic or aesthetic purposes.

from The Century Dictionary and Cyclopedia

  • Pertaining to functions; relating to some office or function.
  • Pertaining to an algebraical operation: as, a functional symbol.
  • Having the function usual to the part or organ: as, functional wings of an insect (that is, those used for flying).

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adj. (of e.g. a machine) performing or capable of performing
  • adj. fit or ready for use or service
  • adj. designed for or adapted to a function or use
  • adj. involving or affecting function rather than physiology
  • adj. designed for or capable of a particular function or use
  • adj. relating to or based on function especially as opposed to structure

Etymologies

function +‎ -al (Wiktionary)

Examples

  • "You've probably heard of the term functional MRI," she said.

    Breaking News: CBS News

  • In this paper, the term functional ingredients refers to substances purported to improve bodily functioning that are added to traditional foods through a manufacturing or other process.

    Center on Budget: Comprehensive News Feed

  • It is important here that I clarify how I am using the term functional in this context.

    MachineMachine (formerly 'The Huge Entity')

  • You probably noticed that the term functional programming has appeared in many areas recently - the C# 3.0 and LINQ have been largely influenced by this paradigm and many of the libraries that enable and simplify writing parallel code rely on functional ideas.

    The Code Project Latest Articles

  • The first time I heard the term functional construction was when I was writing the LINQ to XML section of my book LINQ Unleashed: for C# from Sams.

    Developer.com

  • Although the term functional might in your mind be somewhat a limiting factor, the good thing about F# is that it supports object-oriented constructs, and also has full access to the.

    undefined

  • Mr. Nida used native speakers to produce what he called "functional equivalence"—translations that are true to the spirit rather than the literal words, as had been the rule in earlier times.

    Spreading the Word in Hundreds of Tongues

  • We also increasingly find ourselves involved in what we call functional cooperation.

    Speech: Australia, Asia and Global Drivers for Change

  • This disease is nothing but what we call a functional nervous trouble.

    How to Eat A Cure for "Nerves"

  • I think the advance of brain imaging and what we call functional brain imaging, seeing what your brain is doing while we challenge it, has really clarified a lot of what's happening.

    NPR Topics: News

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