sec ‧ re ‧ tar ‧ i ‧ at /ˌsekrəˈteəriət, ˌsekrɪˈteəriət $ -ˈter-/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Language: French ; Origin: secrétariat , from Medieval Latin secretarius ; ⇨ ↑ secretary ]
a government office or the office of a large international organization, especially one that has a ↑ secretary general in charge of it:
the United Nations Secretariat in New York