When property is sequestrated, it is taken officially from someone who has debts, usually after a decision in a court of law. If the debts are paid off, the property is returned to its owner. He tried to prevent union money from being sequestrated by the courts. = sequester + sequestration se·ques·tra·tion the sequestration of large areas of land. to take property away from the person it belongs to because they have not paid their debts (sequestrare; SEQUESTER)