functional

Universal Words adjective 1 practical and useful; with little or no decoration: Bathrooms don't have to be purely functional. * The office was large and functional rather than welcoming. 2 having a special purpose; making it possible for sb to do sth or for sth to happen: a functional disorder (= an illness caused when an organ of the body fails to perform its function) * a functional approach to language learning * These units played a key functional role in the military operation. 3 (especially of a machine, an organization or a system) working; able to work: a fully functional hospital functionally adverb