functional

[fuhngk-shuh-nl]

adjective

noun

Mathematics. a function that has a domain whose elements are functions, sets, or the like, and that assumes numerical values.

Origin of functional

First recorded in 1625–35; function + -al1
Related formsfunc·tion·al·i·ty, nounfunc·tion·al·ly, adverbhy·per·func·tion·al, adjectivehy·per·func·tion·al·ly, adverbmul·ti·func·tion·al, adjectivenon·func·tion·al, adjectivenon·func·tion·al·ly, adverbpre·func·tion·al, adjectivesem·i·func·tion·al, adjectivesem·i·func·tion·al·ly, adverbsub·func·tion·al, adjectivesub·func·tion·al·ly, adverbsu·per·func·tion·al, adjectiveun·func·tion·al, adjectiveun·func·tion·al·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019


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British Dictionary definitions for functional

functional

adjective

of, involving, or containing a function or functions
practical rather than decorative; utilitarianfunctional architecture
capable of functioning; working
med affecting a function of an organ without structural change
psychol
  1. relating to the purpose or context of a behaviour
  2. denoting a psychosis such as schizophrenia assumed not to have a direct organic cause, like deterioration or poisoning of the brainCompare organic psychosis

noun

maths a function whose domain is a set of functions and whose range is a set of functions or a set of numbers
Derived Formsfunctionally, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for functional
adj.

1630s; as a term in architecture, "utilitarian," 1928; see function (n.) + -al (1). Related: Functionally; functionality.

Online Etymology Dictionary, © 2010 Douglas Harper

functional in Medicine

functional

[fŭngkshə-nəl]

adj.

Of or relating to a function.
Affecting the physiological function but not the structure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

functional in Science

functional

[fŭngkshə-nəl]

Affecting bodily functions but not organic structure, as a disorder such as irritable bowel syndrome. Compare organic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.