地球|ちきゅうchikyuu[0]heiban (flat)
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- nounEarth; the globe
- Synonym世界せかいNeutralRefers to the world as the realm of countries, society, and human affairs rather than the planet as a physical body; register is neutral, and it is the usual equivalent of English 'world'.
Choose 地球 for the Earth as a physical body — the planet itself, as in science or environmental topics — and 世界 for the world of countries, society, and human affairs.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


