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. adjective
    designed for or capable of a particular function or use
    “a style of writing in which every word is functional
    functional architecture”
    affecting or involved in structure or construction
    useful, utilitarian
    having a useful function
    ready for service or able to give long service
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    not having or performing a function
    not structural
    cosmetic, decorative, ornamental
    serving an esthetic rather than a useful purpose
    not ready for service
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  2. adjective
    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”
    concerned with actual use or practice
  3. adjective
    fit or ready for use or service
    “the toaster was still functional even after being dropped”
    synonyms: operable, operational, usable, useable
    ready for service or able to give long service
  4. adjective
    (of e.g. a machine) performing or capable of performing
    “a functional set of brakes”
    synonyms: operative, running, working
    performing or able to perform its regular function
  5. adjective
    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”
  6. adjective
    involving or affecting function rather than physiology
    functional deafness”
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    involving or affecting physiology or bodily organs
Word Family

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