noun
cloud of dust; mundane world
Literary term. Literally 'crimson dust', used for a cloud of dust raised by worldly activity, and metaphorically for the dusty, troubled secular world.
紅塵を避けて山に隠れ住む。
He hides away in the mountains to escape the dusty world.
街は紅塵にまみれていた。
The town was covered in a cloud of dust.