upset because something you hoped for has not happened or been as good, successful, etc. as you expected disappointed (at/by something) They were bitterly disappointed at the result of the game. I was disappointed by the quality of the wine. disappointed (in/with somebody/something) I'm disappointed in you—I really thought I could trust you! I was very disappointed with myself. disappointed (to see, hear, etc.) He was disappointed to see she wasn't at the party. disappointed (that…) I’m disappointed (that) it was sold out. disappointed (not) to be… She was disappointed not to be chosen. See related entries: DisappointmentExtra examples He seemed almost disappointed when I agreed to go. He’s disappointed in his daughter. I was bitterly disappointed when I didn’t get into college. I was slightly disappointed by her attitude. I’m disappointed about John not coming. If you think I’ll agree to that, then you’re going to be sadly disappointed. Jerry sounded genuinely disappointed. The decision left them very disappointed. They’re disappointed at the result. We’re disappointed with the new car. Disappointed applicants will be placed on a waiting list in case of cancellations. He was disappointed to see she wasn’t at the party. I’m disappointed (that) it was sold out. I’m disappointed in you—I really thought I could trust you!