1. An ending of a story, movie, book, or event that fails to satisfy expectations and leaves the audience or participants disappointed
The movie had great potential but ended with a letdown ending that left viewers frustrated.
O filme tinha grande potencial, mas terminou com um final decepcionante que deixou os espectadores frustrados.
2. A conclusion that does not match the buildup or promise of what came before
After all the suspense, the mystery's letdown ending was anticlimactic.
Depois de todo o suspense, o final decepcionante do mistério foi anticlimático.