- dis|ap|point|ment [ ,dısə`pɔıntmənt ] noun **1. ) uncount the feeling of being unhappy because something you hoped for or expected did not happen or because someone or something was not as good as you expected:disappointment at: Diplomats expressed disappointment at the lack of progress.to someone's disappointment (=making someone disappointed): Jackson canceled the concert, to the great disappointment of his fans.disappointment with: The representatives acknowledged their disappointment with the negotiations.2. ) count someone or something that is not as good as you thought they would be:a big/great/bitter/major disappointment: Newcombe has described the defeat as the biggest disappointment of his career.be a disappointment to someone: I'm such a disappointment to her.
Usage of the words and phrases in modern English. 2013.