fiduciary
adjective(fi-du-ci-ar-y)
relating to or of the nature of a legal trust (i.e. the holding of something in trust for another)
Examples:
A fiduciary contract.
In a fiduciary capacity.
fiduciary
noun(fi-du-ci-ar-y)
a person who holds assets in trust for a beneficiary
Examples:
It is illegal for a fiduciary to misappropriate money for personal gain.