Sequestration is the act of isolating or separating something from the rest. It is commonly used in legal contexts, such as when a court orders someone to be sequestered from the public or when a jury is sequestered during a trial. In other contexts, it can refer to the act of isolating a person or thing from the environment, such as when a hazardous material is sequestered from the environment. Sequestration can also refer to the act of isolating a person or thing from the public, such as when a witness is sequestered from the public during a trial.