Word Study
authorities (root: authority)
CIDE DICTIONARY
authorities, n.
the organization that is the governing authority of a political unit. [WordNet 1.5]
THESAURUS
authorities
John Bull, Uncle Sam, Washington, Whitehall, bureaucracy, directorate, hierarchy, higher echelons, higher-ups, management, ministry, officialdom, prelacy, ruling class, ruling classes, the Crown, the Establishment, the administration, the authorities, the government, the ingroup, the interests, the people upstairs, the power elite, the power structure, the top, them, they, top brassFor further exploring for "authorities" in Webster Dictionary Online