[from Latin: fiducia, trust]
1 n. A person, such as a trustee, who holds a position of trust or confidence with respect to someone else and who is therefore obliged to act solely for that person's benefit.
2 adj. In a position of trust or confidence. Fiduciary relationships include those between trustees and their beneficiaries, company promoters and directors and their shareholders, solicitors and their clients, and guardians and their wards.