A board of directors is a recognized group of people who jointly oversee the activities of an organization, which can be either a for-profit business, nonprofit organization, or a government agency. Such a board's powers, duties, and responsibilities are determined by government regulations (including the jurisdiction's corporations law) and the organization's own constitution and bylaws. These authorities may specify the number of members of the board, how they are to be chosen, and how often they are to meet.

In an organization with voting members, the board is accountable to, and might be subordinate to, the organization's full membership, which usually vote for the members of the board. In a stock corporation, non-executive directors are voted for by the shareholders and the board is the highest authority in the management of the corporation. The board of directors appoints the chief executive officer of the corporation and sets out the overall strategic direction. In corporations with dispersed ownership, the identification and nomination of directors (that shareholders vote for or against) are often done by the board itself, leading to a high degree of self-perpetuation. In a non-stock corporation with no general voting membership, the board is the supreme governing body of the institution;^[1] its members are sometimes chosen by the board itself.^[2][3]