Longman Dictionary of Contemporary English
A public utility (usually just utility) is an organization that maintains the infrastructure for a public service (often also providing a service using that infrastructure). Public utilities are subject to forms of public control and regulation ranging from local community-based groups to statewide government monopolies.
The term utilities can also refer to the set of services provided by these organizations consumed by the public: electricity, natural gas, water, and sewage. Broadband internet services (both fixed-line and mobile) are increasingly being included within the definition.
Usage examples of "public utility".
And behind the smoke of this odd backwater of market theory is a multi-continental war over the ownership and control of $4 trillion in public utility infrastructure, a story that began a decade earlier, with Jake’.
The cabin has its own generator, so there aren't any public utility records.
That means we can't knock down or burn up buildings, we are to leave civilians and their housing alone, and we are not to tamper with the public utility systems.
But seeing that so many citizens daily assemble in the lodges and halls of the palace, not for any public utility, but only for the gratification of their own ambition, we have thought that as those who assemble for the ruin of the republic are fearless, so still less ought they to be apprehensive who meet together only for its advantage.
And is there not considerable revenue to be captured by licensing a public utility of eroticism, carefully regulated and heavily taxed?
Canals, aqueducts, bridges, stately buildings, and various edifices for public utility, were entered upon.
The monorail is a free piece of public utility software that enables users to change their location on the Street rapidly and smoothly.
The air for sleeping was a public utility, and a necessity if one were to avoid the narcotic blandishments the giant ferns released upon the night air of the planet.