The act of establishing. The condition or fact of being established. Something established, as: An arranged order or system, especially a legal code. A permanent civil, political, or military organization. An established church. A place of residence or business with its possessions and staff. A public or private institution, such as a hospital or school. An established social order, as: A group of people holding most of the power and influence in a government or society. Often used with the. A controlling group in a given field of activity. Often used with the.