1. An important section of text, music, or other work that is crucial to understanding its meaning or significance
This key passage in the novel reveals the protagonist's true motivation.
Esta passagem chave no romance revela a verdadeira motivação do protagonista.
2. A critical route or corridor through which one must pass to reach a destination
The mountain pass was a key passage for trade routes between the two regions.
O desfiladeiro era uma passagem chave para as rotas comerciais entre as duas regiões.
3. In music, a transitional or pivotal section that is essential to the composition's structure
The key passage in the symphony bridges the first and second movements.
A passagem chave na sinfonia conecta o primeiro e segundo movimentos.