Definition of functional in English:


Pronunciation /ˈfəNG(k)SH(ə)n(ə)l/ /ˈfəŋ(k)ʃ(ə)n(ə)l/

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  • 1Of or having a special activity, purpose, or task; relating to the way in which something works or operates.

    • ‘there are important functional differences between left and right brain’
    1. 1.1(of a disease) affecting the operation, rather than the structure, of an organ.
      ‘functional diarrhea’
      • ‘The challenge is to reliably sift out and satisfactorily reassure the 40% with functional disease without missing those with more serious pathology.’
      • ‘Malnutrition, typhus, tuberculosis, sepsis, and universal diarrhoea (probably functional rather than infective) were rife.’
      • ‘Patients with predominant epigastric pain without peptic ulcer disease or oesophagitis have functional dyspepsia.’
      • ‘Although IBS is a functional disease, it not only causes physical suffering but also has a great impact on people's quality of life.’
      • ‘No patients were excluded on the basis of the type of structural or functional heart disease.’
      • ‘There is good evidence for structural and functional diversity within a hepatic acinus, which is the smallest structural / functional unit in the organ.’
      • ‘These four species, however, are the only cereals from which functional disease resistance genes have been isolated and characterized.’
      • ‘The worth of the person is not affected by disease, disability, functional status, or proximity to death.’
      • ‘They may have functional dyspepsia or diseases such as peptic ulcer or gastro-oesophageal reflux disease.’
      • ‘Persistent symptoms are often multiple and disabling and may be described as functional syndromes.’
      • ‘Reveal tumors and functional disorders in organs such as the lungs, liver, pancreas, kidney and spleen’
      • ‘Age at disease onset and functional class were the strongest independent predictors of survival.’
      • ‘Patients with functional heartburn have symptoms that are typical of esophageal disease but that have no physical explanation.’
      • ‘Cardiac disease, including left ventricular structural and functional disorders, is an important and potentially treatable comorbidity of early kidney disease.’
      • ‘Indeed, the histologic findings revealed less damage, suggesting better functional organ capacity in these animals.’
      • ‘Heart failure is a complex syndrome that results from any structural or functional cardiac disorder that impairs the ability of the heart to function as a pump.’
      • ‘Many patients with functional class IV heart failure are symptomatic because of inadequate diuresis.’
      • ‘It also can be used to treat functional disorders such as trigeminal neuralgia.’
      • ‘Amyloidosis is a functional disorder marked by unusual depositions of amyloid protein in various organs.’
      • ‘In clinical practice, severe liver disease and celiac disease are probably the two most common causes of functional hyposplenism.’
    2. 1.2(of a mental illness) having no discernible organic cause.
      ‘functional psychosis’
      • ‘The cases have been described as either a ‘toxic psychosis’ or a functional psychosis.’
      • ‘This discussion focuses on the acute treatment of functional psychosis.’
      • ‘The main differential diagnosis of delirium is from a functional psychosis (such as schizophrenia and manic depression) and from dementia.’
      • ‘The highly influential psychiatrist and philosopher Jaspers listed the functional psychoses as schizophrenia, manic - depressive insanity, and epilepsy.’
      • ‘It's a deep vein of functional psychosis in my family.’
      • ‘Depending on which symptoms are apparent, delirium may be mistaken for a variety of disorders including dementia, mood disorders, and functional psychoses.’
      • ‘Of particular interest is the more controversial class of amnesic syndromes known as dissociative, functional, or psychogcnic amnesias.’
      • ‘Psychoses may be divided into two categories, organic or functional.’
      • ‘Physicians would note amnesia in a chart and try to determine whether the amnesia was organic or functional.’
      • ‘Insomnia may be functional, a signal that you need to attend to what got you up.’
      • ‘An estimated 4 to 7 percent of prisoners suffer from a functional psychotic mental illness’
      • ‘This edition divides voice disorders into three causal areas: functional, organic and neorogenic, with a separate chapter on each.’
      • ‘In any case there were no discernible functional consequences associated with the removal of these amino acids.’
      • ‘Various prokinetic drugs might help in organic and functional dyspepsia.’
  • 2Designed to be practical and useful, rather than attractive.

    ‘she had assumed the apartment would be functional and simple’
    • ‘Once again, Pearl Izumi has designed a functional and attractive article of clothing that is not only great on the bike but in other uses as well.’
    • ‘That is, sites that are attractive, practical, functional, and interesting.’
    • ‘It's an attractive and functional design and a excellent exemplar of public art.’
    • ‘Each item is also faithful to a set of core principles including value for money, simple, functional design and basic, understated colour.’
    • ‘According to a company press release, the site was chosen for its ‘simple, functional, yet elegant design’.’
    • ‘Katy chose to focus on design, as in functional contemporary design rather than fine art and sculpture.’
    • ‘This means that my bras tend to be functional rather than visually attractive.’
    • ‘There are no flashy lights or LED's so if this is something you are looking for, look elsewhere; the unit is designed to be functional and simple above all else.’
    • ‘Charlotte, on the other hand, has a clean and simple, elegant and functional design, that was highly usable.’
    • ‘‘Gauche, perhaps, but practical, functional, and utilitarian,’ Saffron said.’
    • ‘The design elements and functional characteristics of the product itself are just part of the overall marketing process.’
    • ‘In fact, you don't need a book collection at all, since these functional and attractive ladders are every bit as useful in the kitchen, den, home office or even the garage.’
    • ‘The plain, yet functional, robot design had been wholly transformed into a work of art that even the greatest masters would weep at the sight of.’
    • ‘The great variety of design and the opportunity to own a very attractive, functional tool also make knives highly collectible.’
    • ‘For a web design to be amazing it has to be eye-catching, functional and practical.’
    • ‘Simple in appearance and designed to be functional, the very first fabric awnings were only installed when and where they were needed.’
    • ‘Its original simple black frame was more functional than attractive, and curators wanted a more appropriate treatment.’
    • ‘Gernon is attracted not only to its functional design but to its versatility.’
    • ‘But like all good design, it is functional as well, with training and conference suites as well as office accommodation, a library, an organic café and a retail area.’
    • ‘Influenced by the avant-garde jewellery art scene in Germany, her designs go beyond functional accessory into the realm of individual self-expression.’
    • ‘With quality and functional differences among products largely having narrowed over the past decade or so, eye-catching design can be decisive.’
    practical, useful, utilitarian, utility, workaday, serviceable
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  • 3Working or operating.

    ‘the museum will be fully functional from the opening of the festival’
    • ‘Perhaps the most interesting aspect is the contrast between this flamboyant style and some of the more functional, if effective, tactics employed by Europe's top sides.’
    • ‘In fact, an attack may have no functional effect either - it may create directly an operational effect on the decisionmaker.’
    • ‘The Dolby Digital 2.0 track is uninspiring, but completely functional and effective for a dialogue-driven feature.’
    • ‘Long before we knew anything about the physical basis of heredity, factors or genes were identified in terms of their functional or phenotypic effects.’
    • ‘The response to the scandals was a campaign aimed more at suppressing illegal abuses than at boosting the functional effectiveness of intelligence.’
    • ‘Cogently, it is important to indicate that effective leadership requires a functional working credo that is more appropriate for the years ahead.’
    • ‘Future examinations of behavioral and functional effects on reproduction will allow us to conduct better ecological risk assessments.’
    • ‘The concept is to assure food safety through development, implementation, and effective management of a functional hazard control programme.’
    • ‘In this experimental study, the effect of a functional approach to grammar teaching is examined in the context of French immersion classes at the grade 6 level.’
    • ‘They are straightforward in nature and won't win any prizes for sophistication, but they are functional and effective.’
    • ‘There are many examples of organizations continuing to exist even where they are not particularly effective or functional.’
    • ‘And the vision that must develop has to be one that is functional and that is effective in a globalised world.’
    • ‘Eric works hard to keep the site not just functional and operating, but to make sure it thrives and is a viable source of information, as well as a medium for all the writers to reach a variety of readers.’
    • ‘While the department was fully functional, operating with five pharmacists, Lochan said as of yesterday, a vacancy was created when a member of staff went on extended leave.’
    • ‘And Mr. Hogan, what you were saying that maybe 2005 or 2004, we might be functional, operating from our new site?’
    working, in working order, functioning, effective, usable, in service, in use
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  • 4Mathematics
    Relating to a variable quantity whose value depends upon one or more other variables.

    ‘using functional notation, we can write—where L is the transactions demand for money’
    • ‘The author has succeeded in writing a book understandable to readers with very little knowledge of functional analysis and topological vector spaces.’
    • ‘He did publish a number of papers, however, which arose through the various courses such as algebraic topology, functional analysis, and geometry, which he taught.’
    • ‘How can we relate complex analysis, higher-dimensional geometry, functional analysis, and set theory to the forms of perception?’
    • ‘His work on functions of a real variable include results on functional series, differentiability of functions and Baire's classification.’
    • ‘In 1823 Abel published papers on functional equations and integrals in a new scientific journal started up by Hansteen.’