a ‧ gen ‧ cy S3 W1 /ˈeɪdʒ ə nsi/ BrE AmE noun ( plural agencies ) [countable]
1 . a business that provides a particular service for people or organizations
an advertising/employment/travel etc agency
a local housing agency
⇨ ↑ dating agency , ↑ news agency
2 . an organization or department, especially within a government, that does a specific job:
a UN agency responsible for helping refugees
the Environmental Protection Agency
3 . by/through the agency of somebody formal being done as the result of someone’s help