
die Erde
Earth
The planet on which humans live; the third planet in the solar system.
Die Erde braucht etwa 365 Tage, um die Sonne einmal zu umrunden.
The Earth takes about 365 days to orbit the Sun once.
Earth / soil
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Earth
The planet on which humans live; the third planet in the solar system.
Die Erde braucht etwa 365 Tage, um die Sonne einmal zu umrunden.
The Earth takes about 365 days to orbit the Sun once.

soil
The ground or earth in which plants grow; the substance of the land surface.
Für die neuen Tomatenpflanzen brauchen wir frische Erde.
For the new tomato plants, we need fresh soil.

ground
In electrical engineering, the conductive connection to the ground that serves as a safety measure.
Die Waschmaschine muss an die Erde angeschlossen sein, um Stromschläge zu vermeiden.
The washing machine must be connected to ground to avoid electric shocks.

on Earth
A fixed expression that describes worldly, mortal life on the planet in contrast to heaven or an afterlife.
Er wünschte sich nichts sehnlicher als Frieden auf Erden.
He wished for nothing more deeply than peace on Earth.
The use of the article helps distinguish the meanings. 'Die Erde' with the definite article almost always means the planet. When speaking of the material 'Erde' (soil), for example for plants, no article is often used.
Die Erde ist der einzige Planet mit flüssigem Wasser.
The Earth is the only planet with liquid water.
Other words are derived from 'die Erde' (Earth/soil). The verb 'erden' means to connect an electrical device to ground. The adjective 'irdisch' means 'worldly' or 'belonging to the Earth.'
Aus Sicherheitsgründen muss man Elektrogeräte immer erden.
For safety reasons, electrical devices must always be grounded.
You can recognize the meaning 'Boden/Erdreich' (ground/soil) from the context. If the topic is gardening, plants, pots, or construction work, this material meaning is intended. It is also often used in compounds such as 'Blumenerde' (potting soil) or 'Muttererde' (topsoil).
Die Karotten wachsen am besten in lockerer Erde.
Carrots grow best in loose soil.
The technical meaning 'elektrische Erdung' (electrical grounding) is very specific. You can recognize it in the context of electricity, cables, sockets, and safety instructions. The related verb is 'erden' (to ground).
Prüfen Sie, ob das Kabel an der Erde angeschlossen ist.
Check whether the cable is connected to ground.
The expression 'auf Erden' (on Earth) is poetic, religious, or very formal. It is used to describe life on our planet in contrast to heaven or life after death. In normal everyday language, people usually say 'auf der Welt' (in the world).
Viele Menschen wünschen sich Frieden auf Erden.
Many people wish for peace on Earth.
world
Welt and Erde can both refer to the planet with its countries and living beings. Erde places more emphasis on the physical planet, while Welt often emphasizes the global or human perspective. Erde usually fits scientific statements, while Welt is often used for global topics.

Die Erde bewegt sich auf ihrer Bahn um die Sonne.
The Earth moves in its orbit around the sun.
Die ganze Welt muss gemeinsam gegen den Klimawandel handeln.
The whole world must work together to combat climate change.