functional

designed for or capable of a particular function or use

• “a style of writing in which every word is functional”
• “functional architecture”

involving or affecting function rather than physiology

• “functional deafness”

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”

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”

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”

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

• “in running (or working) order”
• “a functional set of brakes”