1. The quality or state of being opaque; lack of transparency or translucency
The opacity of the frosted glass prevents people from seeing through it.
A opacidade do vidro fosco impede que as pessoas vejam através dele.
2. Lack of clarity or intelligibility; obscurity in meaning or expression
The opacidade of his writing made it difficult to understand his main argument.
A opacidade de sua escrita tornou difícil entender seu argumento principal.
3. In art and design, the degree to which a color or material blocks light
You can adjust the opacity of the layer in the image editing software.
Você pode ajustar a opacidade da camada no software de edição de imagens.