Antonyms of adj functional

5 of 6 senses of functional

Sense 1
functional (vs. nonfunctional) -- (designed for or capable of a particular function or use; "a style of writing in which every word is functional"; "functional architecture")

nonfunctional (vs. functional) -- (not having or performing a function)
        => nonstructural -- (not structural)
        => cosmetic, decorative, ornamental -- (serving an esthetic rather than a useful purpose; "cosmetic fenders on cars"; "the buildings were utilitarian rather than decorative")

Sense 2
functional (vs. organic) -- (involving or affecting function rather than physiology; "functional deafness")

organic (vs. functional) -- (involving or affecting physiology or bodily organs; "an organic disease")

Sense 4
functional, usable, useable, operable, operational -- (fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order")

INDIRECT (VIA serviceable) -> unserviceable -- (not ready for service; "unserviceable equipment may be replaced")

Sense 5
functional -- (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")

INDIRECT (VIA practical) -> impractical -- (not practical; not workable or not given to practical matters; "refloating the ship proved impractical because of the expense"; "he is intelligent but too impractical for commercial work"; "an impractical solution")

Sense 6
running (prenominal), operative, functional, working (prenominal) -- ((of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes")

INDIRECT (VIA functioning) -> malfunctioning, nonfunctional -- (not performing or able to perform its regular function; "a malfunctioning valve")

Similarity of adj functional

6 senses of functional

Sense 1
functional (vs. nonfunctional) -- (designed for or capable of a particular function or use; "a style of writing in which every word is functional"; "functional architecture")
       => structural -- (affecting or involved in structure or construction; "the structural details of a house such as beams and joists and rafters; not ornamental elements"; "structural damage")
       => utilitarian, useful -- (having a useful function; "utilitarian steel tables")
          Also See-> serviceable#1

Sense 2
functional (vs. organic) -- (involving or affecting function rather than physiology; "functional deafness")

Sense 3
functional -- (relating to or based on function especially as opposed to structure; "the problem now is not a constitutional one; it is a functional one"; "delegates elected on a functional rather than a geographical basis")

Sense 4
functional, usable, useable, operable, operational -- (fit or ready for use or service; "the toaster was still functional even after being dropped"; "the lawnmower is a bit rusty but still usable"; "an operational aircraft"; "the dishwasher is now in working order")
       => serviceable (vs. unserviceable) -- (ready for service or able to give long service; "serviceable equipment"; "heavy serviceable fabrics")

Sense 5
functional -- (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")
       => practical (vs. impractical) -- (concerned with actual use or practice; "he is a very practical person"; "the idea had no practical application"; "a practical knowledge of Japanese"; "woodworking is a practical art")

Sense 6
running (prenominal), operative, functional, working (prenominal) -- ((of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes")
       => functioning (vs. malfunctioning) -- (performing or able to perform its regular function; "a functioning flashlight")