1. n. reliance on or confidence in the dependability of someone or something. In interpersonal relationships, trust refers to the confidence that a person or group of people has in the reliability of another person or group; specifically, it is the degree to which each party feels that they can depend on the other party to do what they say they will do. The key factor is not the intrinsic honesty of the other people but their predictability. Trust is considered by most psychologists to be a primary component in mature relationships with others, whether intimate, social, or therapeutic. See basic trust versus mistrust; security.

2. vb. to have trust in someone or something.