functional

Use the adjective functional to describe something that is made to do a specific job, such as the functional alarm clock feature on a digital stopwatch.

The word functional comes from the Latin word functionem, meaning "performance, execution." It can also describe whether something is working properly. This is what shoppers at a garage sale want to be sure of before they leave with an old television — they plug it in to make sure it's functional. In this case the opposite of functional is useless.

Definitions of functional
1

adj designed for or capable of a particular function or use

“a style of writing in which every word is functional
functional architecture”
Synonyms:
structural
affecting or involved in structure or construction
useful, utilitarian
having a useful function
serviceable
ready for service or able to give long service
Antonyms:
nonfunctional
not having or performing a function
nonstructural
not structural
cosmetic, decorative, ornamental
serving an esthetic rather than a useful purpose
unserviceable
not ready for service
show more antonyms...

adj designed for or adapted to a function or use

functional education selects knowledge that is concrete and usable rather than abstract and theoretical”
functional architecture”
Synonyms:
practical
concerned with actual use or practice

adj fit or ready for use or service

“the toaster was still functional even after being dropped”
Synonyms:
operable, operational, usable, useable
serviceable
ready for service or able to give long service

adj (of e.g. a machine) performing or capable of performing

“a functional set of brakes”
Synonyms:
operative, running, working
functioning
performing or able to perform its regular function

adj relating to or based on function especially as opposed to structure

“it is a functional one”
“delegates elected on a functional rather than a geographical basis”

adj involving or affecting function rather than physiology

functional deafness”
Antonyms:
organic
involving or affecting physiology or bodily organs

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