An organization or organisation is an entity comprising multiple people, such as an institution or an association. That has a collective goal and is the link to an external environment. Organizational, relating to an organization or the way it is set-up, the action of organizing something.
There are a variety of legal types of organizations, including corporations, governments, non-governmental organizations, political organizations, international organizations, arm forces, charities, not-for-profit corporations, partnerships, cooperatives, and educational institutions. A hybrid organization is a body that operates in both the public sector and the private sector simultaneously, fulfilling public duties and developing commercial market activities.
A voluntary association is an organization consisting of volunteers. Such organizations may be able to operate without legal formalities, depending on jurisdiction, including informal clubs. Organizations may also operate in secret and/or illegally in the case of secret societies, criminal organizations and resistance movements.