1. An conclusion or finale of something (such as a story, movie, game, or event) that fails to meet expectations and leaves one feeling let down or unsatisfied
The movie had a disappointing ending that left the audience frustrated.
O filme teve um final decepcionante que deixou a plateia frustrada.
2. An outcome that is anticlimactic or falls short of what was anticipated or promised
After all the buildup, the season finale was a disappointing ending.
Depois de toda a expectativa, o final da temporada foi uma final decepcionante.