Definition of secretariat noun from the Oxford Advanced Learner's Dictionary

 

secretariat

 noun
noun
BrE BrE//ˌsekrəˈteəriət//
 
, BrE//ˌsekrəˈteəriæt//
 
; NAmE NAmE//ˌsekrəˈteriət//
 
 
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the department of a large international or political organization which is responsible for running it, especially the office of a secretary general Word Origin early 19th cent.: from French secrétariat, from medieval Latin secretariatus, from secretarius ‘confidential officer’, from Latin secretum ‘secret’, neuter of secretus ‘separate, set apart’, from the verb secernere, from se- ‘apart’ + cernere ‘sift’.
See the Oxford Advanced American Dictionary entry: secretariat