From Longman Business Dictionary
trusteetrust·ee /ˌtrʌˈstiː◂/ noun [countableC]1LAWFINANCEsomeone who controls money or property that is in a trust for someone elsethe trustees of the pension fund
→ active trustee → bare trustee → constructive trustee2FINANCEa member of a group that controls the money of a company, college, or other organizationIt is being operated by a trustee appointed by the federal Bankruptcy Court.