spiritual world; mental world
Refers to the realm of mind, spirit, or consciousness, often contrasted with the physical/material world (物質界). Used in philosophical, religious, or psychological contexts.
Antonyms: 物質界
彼は精神界の探求に生涯を捧げた。
He devoted his life to exploring the spiritual world.
この哲学書は物質界と精神界の関係を論じている。
This philosophy book discusses the relationship between the material world and the mental world.
material world; physical realm
Compound of 精神 (seishin, 'mind, spirit') and 界 (kai, 'world, realm'). The exact historical derivation is uncertain, but the term follows a common pattern for abstract domains.