A person into whose possession assets, property, etc., are put, to be held or administered for the benefit of another; A person who is entrusted with the care or preservation of an abstract entity or concept for the benefit of another person or (esp.) for the benefit of society or posterity; Any of a number of people appointed to manage or oversee the affairs of an institution. Also: a member of the governing body of a trust; A person who has the property of a debtor in his or her possession, and from whom that property may be attached or legally seized in a trustee process