disappointment

/ˌdɪsəˈpɔɪntmənt/
noun
  1. The feeling of sadness or letdown when something does not happen as hoped or expected.
    • He felt a deep disappointment after failing the driving test.
    • She tried to hide her disappointment when she didn't get the job.
    • The cancellation of the trip was a huge disappointment for the children.
  2. A person or thing that causes such a feeling.
    • He was a disappointment to his parents when he dropped out of school.
    • The team's performance this season has been a disappointment to fans.
    • The new smartphone turned out to be a disappointment because it kept freezing.