[n] how a result is obtained or an end is achieved; "a means of control"; "an example is the best agency of instruction"; "the true way to success"
[n] a business that serves other businesses
[n] an administrative unit of government; "the Central Intelligence Agency"; "the Census Bureau"; "Office of Management and Budget"; "Tennessee Valley Authority"
[n] the state of serving as an official and authorized delegate or agent
[n] the state of being in action or exerting power; "the agency of providence"; "she has free agency"