fiduciary

Etymology

From Latin fīdūciārius (“held in trust”), from fīdūcia (“trust”).

adj

1. (law) Relating to an entity that owes to another good faith, accountability and trust, often in the context of trusts and trustees.
   a fiduciary contract
   a fiduciary duty
2. Pertaining to paper money whose value depends on public confidence or securities.
   Indeed, currency would be more effective for not being gold and silver but fiduciary paper money. 2002, Colin Jones, The Great Nation, Penguin, published 2003, page 63
3. (nonstandard) Accepted as a trusted reference such as a point, value, or marker; fiducial.

noun

1. (law) One who holds a thing in trust for another.
   “We focus on sustainability not because we’re environmentalists, but because we are capitalists and fiduciaries to our clients,” Mr. Fink wrote. 2022-01-18, Andrew Ross Sorkin, Michael J. de la Merced, quoting Larry Fink, “It’s Not ‘Woke’ for Businesses to Think Beyond Profit, BlackRock Chief Says”, in The New York Times, →ISSN
2. (theology) One who depends for salvation on faith, without works; an antinomian.