An Utility

The state or condition of being useful; usefulness.
Something that is useful.
(economics) The ability of a commodity to satisfy needs or wants; the satisfaction experienced by the consumer of that commodity.
(philosophy) Well-being, satisfaction, pleasure, or happiness.
(business) A commodity or service provided on a continuous basis by a physical infrastructure network, such as electricity, water supply or sewerage. Synonym: service
(business, finance, by extension) A natural or legal monopoly distributer of such a utility; or, the securities of such a provider.
(computing) A software program designed to perform a single task or a small range of tasks, often to help manage and tune computer hardware, an operating system or application software.
(sports) The ability to play multiple positions.