/ fɪˈdjuːʃəri; NAmE ; NAmE also fɪˈduːʃieri/ adjective , noun
( law )
■ adjective
involving trust, especially in a situation where a person or company controls money or property belonging to others :
the company's fiduciary duty to its shareholders
■ noun
( pl. -ies ) a person or company that is in a position of trust, especially when it involves controlling money or property belonging to others
••
WORD ORIGIN
late 16th cent. (in the sense something inspiring trust; credentials ): from Latin fiduciarius , from fiducia trust, from fidere to trust.