1 [noncount] : belief that someone or something is reliable, good, honest, effective, etc.
▪ Our relationship is founded on mutual love and trust. ▪ His lies and deception shattered my trust in him. ▪ She has no trust in the security of online banking. ▪ He placed/put his trust in [=trusted] his closest friends and few others. ▪ She betrayed my trust. 2 a : an arrangement in which someone's property or money is legally held or managed by someone else or by an organization (such as a bank) for usually a set period of time [count] ▪ He created a trust for his children. [noncount] ▪ The property will be held in trust until her 18th birthday. — see also trust fund, unit trust
b [count] : an organization that results from the creation of a trust
▪ a charitable trust 3 [count] chiefly US : a group of companies that work together to try to control an industry by reducing competition
▪ laws limiting the formation of trusts 4 [noncount] : responsibility for the safety and care of someone or something
▪ The child was committed to his trust. ▪ We left our pets in the trust of [=in the care of] our neighbor while we were gone. ▪ She has been placed in a position of trust. [=she has been given a job/position in which she has a lot of responsibility and power]