Overview
A president is a leader of an organization, company, community, club, trade union, university or other group. The relationship between a president and a chief executive officer varies, depending on the structure of the specific organization. In a similar vein to a chief operating officer, the title of corporate president as a separate position (as opposed to being combined with a "C-suite" designation, such as "president and chief executive officer" or "president and chief operating officer") is also loosely defined; the president is usually the legally recognized highest rank of corporate officer, ranking above the various vice presidents (including senior vice president and executive vice president), but on its own generally considered subordinate, in practice, to the CEO. The powers of a president vary widely across organizations and such powers come from specific authorization in the bylaws like Robert's Rules of Order (e.g. the president can make an "executive decision" only if the bylaws allow for it).
History
Originally, the term president was used in the same way that foreman or overseer is used now (the term is still used in that sense today). It has now also come to mean "chief officer" in terms of administrative or executive duties.
Powers and authority
The powers of the president vary widely across organizations. In some organizations the president has the authority to hire staff and make financial decisions, while in others the president only makes recommendations to a board of directors, and still others the president has no executive powers and is mainly a spokesperson for the organization. The amount of power given to the president depends on the type of organization, its structure, and the rules it has created for itself.
From Wikipedia (CC BY-SA 4.0).