Definitions of ouster
a dismissal from a position, especially an official position
Shortly after we demanded his ouster, the CEO resigned his position.
an ouster clause is a clause or provision that is, or that is claimed to be, outside the jurisdiction of the courts
This so-called ouster clause is clear in that it states that only the court in Pekham will have jurisdiction.
preventing someone from getting his or her inheritance
It would be incorrect for this Court to declare title of the property in favour of the male heir and accept his ouster of the female heir.