disappointed at phrase. Definitions by the largest Idiom Dictionary. Learn more. Definition of disappointed at in the Idioms Dictionary. disappointed definition: 1. unhappy because someone or something was not as good as you hoped or expected, or because…. “I am disappointed in you” - means = the subject representing ‘I’ finds disappointment that comes about from the inner decision that the subject representing ‘you’ has made. I am very disappointed in you.

What does disappointed at expression mean? See also: disappointed. They were disappointed in the outcome. That was a terrible thing to do. 2: "I am disappointed with you" (525 results) 3: "I am disappointed by you" Apart from the obvious difference in prevalence, I think there's also a case for saying that #1 there tends to imply everything about you disappoints me, whereas #2 and #3 carry a stronger implication of being disappointed by some specific thing you did.