[ fuhngk-shuh-nl ]
/ ˈfʌŋk ʃə nl /



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


How Hip Is Your Lingo? Take Our Slang Quiz!
If you aren’t already skilled in slang, then this quiz can get you up to speed in no time!
Question 1 of 11
OK Boomer can be perceived as pejorative, but it is mostly considered to be _____

Origin of functional

First recorded in 1625–35; function + -al1

OTHER WORDS FROM functional Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

Example sentences from the Web for non-functional

  • All structure, according to Roux, is either functional or non-functional.

    Form and Function|E. S. (Edward Stuart) Russell
  • Non-functional structure is not affected by functional adaptation, and may accordingly be left out of consideration here.

    Form and Function|E. S. (Edward Stuart) Russell

British Dictionary definitions for non-functional

/ (ˈfʌŋkʃənəl) /


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
  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


maths a function whose domain is a set of functions and whose range is a set of functions or a set of numbers

Derived forms of functional

functionally, 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

Medical definitions for non-functional

[ fŭngkshə-nəl ]


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.

Scientific definitions for non-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.