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fiduciary (EN)
adjective, noun

adjective “fiduciary”

base form fiduciary, non-gradable
  1. describing a relationship where one person or entity must act in good faith and honesty for another's benefit
    Financial advisors have a fiduciary duty to act in the best interests of their clients.
  2. relating to money that depends on public confidence for its value, like paper currency not backed by physical commodities
    After the gold standard was abolished, the government issued fiduciary currency.
  3. serving as a trusted point of reference
    The surveyors placed fiduciary markers along the property boundary.

noun “fiduciary”

singular fiduciary, plural fiduciaries
  1. someone who holds assets or information in trust for another person and has a duty to act in their best interest
    As the executor of the will, she became the fiduciary for her late father's estate.
  2. (in theology) a person who relies on faith alone for salvation, without the need for good deeds
    The preacher argued against the fiduciaries who believed that faith without action was sufficient.