1. A feeling of disappointment when expectations are not met
   "his hopes were so high he was doomed to disappointment";
   - letdown, sell [Brit, informal], comedown [informal]
    
2. An act (or failure to act) that disappoints someone
   "The team's loss in the final game was a disappointment for their fans"

Derived forms: disappointments

Type of: dissatisfaction, failure

Encyclopedia: Disappointment