third estate n the third order or class in a country or society divided into estates, esp. for representation in a parliament; the commons, townsmen, or middle class English Collins Dictionary - English Definition & Thesaurus
DEFINITION of 'C-Suite'. A widely-used slang term used to collectively refer to a corporation's most important senior executives. C-Suite gets its name because top senior executives' titles tend to start with the letter C, for chief, as in chief executive officer, chief operating officer and chief information officer.
Member of an executive leadership team also are called C-level executives because they represent the highest level of organizational management. The C-level suite, for example, consists of a president or CEO, the VP or chief operating officer, a chief financial officer (CFO) and chief information officer (CIO).