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Definition of chief of staff noun from the Oxford Advanced Learner's Dictionary

chief of staff

noun
 
/ˌtʃiːf əv ˈstɑːf/
 
/ˌtʃiːf əv ˈstæf/
(plural chiefs of staff)
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  1. an officer of very high rank, responsible for advising the person who commands each of the armed forces see also Joint Chiefs of Staff
    Oxford Collocations DictionaryChief of staff is used after these nouns:
    • army
    See full entry
  2. (especially North American English) a person who advises the head of an organization and who manages the other employees
    • We'll discuss it with the president's new chief of staff.
See chief of staff in the Oxford Advanced American Dictionary
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noun
 
 
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