this world; earthly world; secular society
Refers to the worldly realm as opposed to the spiritual or monastic life. Often carries a Buddhist or literary tone.
The monk left the secular world and devoted himself to ascetic practice.
ordinary world; everyday life; workaday world
Describes the mundane, everyday world of ordinary people, often contrasted with a special or idealized sphere.
Artists wish to be free from the constraints of the everyday world.
浮世 originally had a Buddhist sense of 'transitory world' but later came to mean the pleasure-seeking urban culture of the Edo period. 俗世間 is broader and less tied to a specific historical era.
Compound of 俗 (ぞく, 'vulgar, worldly') and 世間 (せけん, 'world, society'). The reading ぞくせけん is a straightforward combination of the on'yomi of the two components.