Definition of agency noun from the Oxford Advanced American Dictionary

Oxford3000

agency

noun
/ˈeɪdʒənsi/
 
plural agencies
 
1 a business or an organization that provides a particular service, especially on behalf of other businesses or organizationsan advertising/employment agencyYou can book at your local travel agency.international aid agencies caring for refugees see also news agency2 a government department that provides a particular servicethe Central Intelligence Agency (CIA)IDIOM

through the agency of

(formal) as a result of the action of someone or somethingHe obtained his position through the agency of an old friend.through the agency of