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fiduciary

[ fi-doo-shee-er-ee, -dyoo- ]
/ fɪˈdu ʃiˌɛr i, -ˈdyu- /
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noun, plural fi·du·ci·ar·ies.
Law. a person to whom property or power is entrusted for the benefit of another: All investment advisors registered with the Securities and Exchange Commission (SEC) must act as fiduciaries.
adjective
Law. of or relating to the relationship of trust and good faith between a fiduciary and the person for whom the fiduciary acts: The executor of a will has a fiduciary duty to act in the best interest of the beneficiary.The banks do not assume any financial responsibility—they act in a fiduciary capacity only.The American Medical Association said that physicians have a fiduciary responsibility to patients.
depending on public confidence for value or currency, as fiat money.
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Origin of fiduciary

First recorded in 1585–95; from Latin fīdūciārius “holding on trust; a trustee,” equivalent to fīdūci(a) “trust” + -ārius -ary

OTHER WORDS FROM fiduciary

fi·du·ci·ar·i·ly [fi-doo-shee-er-uh-lee, -dyoo-], /fɪˌdu ʃiˈɛr ə li, -ˌdyu-/, adverbnon·fi·du·ci·ar·y, adjective, noun, plural non·fi·du·ci·ar·ies.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use fiduciary in a sentence

British Dictionary definitions for fiduciary

fiduciary
/ (fɪˈduːʃɪərɪ) law /

noun plural -aries
a person bound to act for another's benefit, as a trustee in relation to his beneficiary
adjective
  1. having the nature of a trust
  2. of or relating to a trust or trustee

Derived forms of fiduciary

fiduciarily, adverb

Word Origin for fiduciary

C17: from Latin fīdūciārius relating to something held in trust, from fīdūcia trust; see fiducial
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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