A person or organization that acts on behalf of another person or persons, putting their clients' interest ahead of their own, with a duty to preserve good faith and trust.
The lawyer acted as a fiduciary for the elderly client, ensuring her assets were managed properly.
A trustee or someone who holds a legal or ethical relationship of trust with one or more parties.
As a fiduciary, the financial advisor was responsible for managing the trust fund in the best interest of the beneficiaries.