UTILITY

The state or condition of being useful; usefulness.

Something that is useful.

The ability of a commodity to satisfy needs or wants; the satisfaction experienced by the consumer of that commodity.

Having to do with, or owned by, a service provider.

"utility line; utility bill"

Designating of a room in a house or building where mechanical equipment is installed; such as a furnace, water tank/heater, circuit breaker, and/or air conditioning unit; and often equipped with hookups for laundry equipment (washer/dryer).

"utility room"