[uncountable] trust (in somebody/something) the belief that somebody/something is good, sincere, honest, etc. and will not try to harm or trick you Her trust in him was unfounded. a partnership based on trust It has taken years to earn their trust. If you put your trust in me, I will not let you down. She will not betray your trust (= do something that you have asked her not to do). He was appointed to a position of trust (= a job involving a lot of responsibility, because people trust him). a breach of trust If I were you, I would not place too much trust in their findings.