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.
corporate officers. The executives of a corporation charged with certain operational responsibilities. Typically appointed by the board of directors, the corporate officers usually include the Chief Executive Officer (CEO) , Chief Financial Officer (CFO) , President, and in some corporations the Chief Operating Officer.