utility - noun

a company that performs a public service; subject to government regulation

the quality of being of practical use

the service (electric power or water or transportation) provided by a public utility

(economics) a measure that is to be maximized in any situation involving choice

(computer science) a program designed for general support of the processes of a computer

a facility composed of one or more pieces of equipment connected to or part of a structure and designed to provide a service such as heat or electricity or water or sewage disposal

utility - adjective

• used of beef; usable but inferior
• capable of substituting in any of several positions on a team

utility - thesaurus

substitute   usefulness