Source : Webster's Revised Unabridged Dictionary (1913)

Secretariat \Sec`re*ta"ri*at\, Secretariate \Sec`re*ta"ri*ate\,
   n. [F. secr['e]tariat.]
   The office of a secretary; the place where a secretary
   transacts business, keeps records, etc.

Source : WordNet®

secretariat
     n 1: an administrative unit responsible for maintaining records
          and other secretarial duties; especially for
          international organizations [syn: {secretariate}]
     2: thoroughbred that won the triple crown in 1973