noun
secular world; mundane life
Refers to the everyday, non-religious world, often contrasted with a spiritual or monastic life. Somewhat literary or formal.
僧侶は俗界を離れて修行に専念した。
The monk left the secular world and devoted himself to ascetic practice.
彼は俗界のしがらみから逃れたいと思っている。
He wants to escape the entanglements of the mundane world.