functional

adj. having a purpose; useful, practical; working, functioning

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Adjective
1. designed for or capable of a particular function or use; "a style of writing in which every word is functional"; "functional architecture"
(antonym) nonfunctional
(similar) structural
(see-also) serviceable
(attribute) function, purpose, role, use
2. involving or affecting function rather than physiology; "functional deafness"
(antonym) organic
(classification) pathology
3. 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"
(pertainym) function, purpose, role, use
4. 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"
(synonym) usable, useable, in working order(p), operable, operational
(similar) serviceable
5. 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"
(similar) practical
6. (of e.g. a machine) performing or capable of performing; "in running (or working) order"; "a functional set of brakes"
(synonym) running(a), operative, working(a)
(similar) functioning

příd.jm. funkční; fungující; praktický

Przym. funkcjonalny; praktyczny; sprawny