From Longman Business Dictionarytrust companyˈtrust ˌcompany1British EnglishFINANCE a company that invests people’s money for them2American EnglishFINANCEPROPERTY a company that acts as a TRUSTEE (=person in charge of a trust) for the property of people who have died, or for property in trust for living people. A trust company may also advise people on investments and invest their money for them → company