FIDUCIARILY Meaning of FIDUCIARILY in English fə̇|d(y)üshē|erə̇lē, fī|-, ˌfīˌ ̷ ̷ ̷ ̷ˈ ̷ ̷ ̷ ̷ ̷ ̷ adverb : in a fiduciary manner Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012