1. An advance or development that occurs in a manner that was not anticipated or foreseen
The unexpected progression of the disease surprised the medical team.
A progressão inesperada da doença surpreendeu a equipe médica.
2. In music or narrative, a sequence of events or chords that defies conventional patterns or listener expectations
The composer's unexpected progression from minor to major created a striking effect.
A progressão inesperada do compositor de menor para maior criou um efeito marcante.