[ fɪ'dju:ʃ(ə)ri ]
■ adjective
1》 Law involving trust, especially with regard to the relationship between a trustee and a beneficiary.
2》 Finance (of a paper currency) depending for its value on securities or the reputation of the issuer.
■ noun ( plural fiduciaries ) a trustee.
Origin
C16 (in the sense 'credentials'): from L. fiduciarius , from fiducia 'trust'.