1.
world, earth
The planet Earth and all its inhabitants.
2.
world, realm, sphere
A particular area of activity or experience.
世界 has two main meanings: the physical world/earth, and a realm or sphere of activity.
MEANINGS:
1. The world/earth: 世界中を旅行する (travel around the world)
2. A realm/sphere: 音楽の世界 (the world of music)
COMMON EXPRESSIONS:
- 世界中: all over the world
- 世界的: worldwide, global
- 世界一: world's best, number one in the world
- 全世界: the whole world
RELATED:
- 地球: Earth (the planet)
- 社会: society