Suffix used to denote a social or professional sphere, such as 芸能界 (show business) or 政界 (political world).
He entered the entertainment world when he was young.
He is famous in the entertainment world.
It is said that connections are necessary to enter the political world.
Taxonomic rank in biology; used in terms like 動物界 (animal kingdom) and 植物界 (plant kingdom).
Living things are sometimes classified into five kingdoms.
erathem (geology)
Geochronologic unit; used in terms like 古生界 (Paleozoic erathem).
The Paleozoic erathem includes strata from about 540 million to 250 million years ago.
Used in physics for a region of influence, e.g., 電界 (electric field) or 磁界 (magnetic field).
Measure the strength of the electric field.
Rare standalone noun meaning a dividing line or limit; more commonly encountered in compounds like 境界 (boundary) or 分界 (division).
The kanji 界 originally meant a boundary.
She is active and successful in the music world.
境界 is the everyday word for a boundary or dividing line, while standalone 界 with this meaning is rare and mostly seen in old or literary usage.
the world; society; the universe · sphere; circle; world · world-renowned; world-famous · Buddhist realm; space
industry; business world; business circles
limit; bound; boundary
best in the world; number one in the world
boundary; border; limit
neighborhood; vicinity; area · community; scene; fandom
field of vision; visibility; view
political world; political circles; world of politics
demon world; realm of demons
The kanji 界 originally depicted a boundary or division between fields. As a suffix, it came to denote a delimited sphere or world. The standalone noun sense 'border' is now rare.
death; the next world · pass away; die
financial world; business circles
boundary; threshold · criticality; nuclear criticality · critical; at the critical point
outside world; external world; physical world
the heavens; the skies; celestial sphere · heavenly realm; deva realm
interface
hades; realm of the dead; underworld
spirit world; spiritual realm
baseball world; baseball circles
various fields; all walks of life; each sector
the earth below; the ground below · this world; the earthly realm
political and business circles; the political and business establishment
academic world; academia; scholarly circles
magnetic field
legal circles; the legal profession
electric field
sumo world; world of sumo
human realm; spiritual realm of humanity
human world; world of man
three realms of existence · whole universe enlightened by Buddha · past, present, and future existences · far-off ...; distant ...
hades; realm of the dead; the netherworld