to fail to satisfy someone or their hopes, wishes, etc., or to make someone feel unhappy
I do not want to disappoint my family, so I try to do well at school.
The movie's ending may disappoint those who were expecting a different resolution.
The team's poor performance is likely to disappoint their loyal fans.
The chef apologized when the dish did not meet the customer's expectations, hoping not to disappoint.
Failing to deliver on promised features can disappoint users of a new software release.
