/ˈtrʌstər/ – noun
Definition: 1. (Scot) người thiết lập sở hữu tín thác;
2. (Scot) người ủy quyền, người cấp giấy ủy nhiệm;
3. chủ nợ.
A more thorough explanation: A “truster” is a person who creates a trust, which is a legal arrangement where a person (the trustor or settlor) transfers property to another person (the trustee) to hold and manage for the benefit of a third party (the beneficiary). The truster is the individual who establishes the trust and sets out the terms and conditions under which the trustee must manage the trust property for the benefit of the beneficiaries.
Example: The truster appointed his brother as the trustee of his estate in his will.