An Actor in a Business Process is a person or organization who perform a Role. The role that is a user or a stakeholder responsible or accountable for one or more steps in a process or the entire process. An actor can perform multiple roles in the context of ac·tor ˈaktər/ noun a person whose profession is Read more about Actor[…]
Accordingly to TOGAF, The highest level (typically) of description of an organization and typically covers all missions and functions. An enterprise will often span multiple organizations. In many cases it can referred as entire business of an organization.