the C-suite - definition and synonyms

noun business informal 

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/ˈsiːˌswiːt/
  1. the most important senior executives in a company, referred to as a group

    Outsourcing is going to attract a lot of attention from the C-suite, and rightfully so.

    Many C-suite executives in smaller companies lack financial sophistication that would help them do a better job.

Word story
From the fact that the titles of senior executives usually start with the letter C for 'chief', for example Chief Financial Officer.