die Wiese
meadow
An area covered with grass and herbs, usually used agriculturally to produce hay or as pasture for animals.
Die Kühe grasten friedlich auf der saftig grünen Wiese.
The cows grazed peacefully in the lush green meadow.

meadow
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meadow
An area covered with grass and herbs, usually used agriculturally to produce hay or as pasture for animals.
Die Kühe grasten friedlich auf der saftig grünen Wiese.
The cows grazed peacefully in the lush green meadow.

Pay attention to the preposition 'auf' and the case. 'Auf der Wiese' (in/on the meadow, dative) describes a location, while 'auf die Wiese' (onto the meadow, accusative) describes movement toward it.
Die Kinder spielen auf der Wiese.
The children are playing in the meadow.
Common activities in a meadow are 'auf der Wiese liegen' (to lie in the meadow), 'ein Picknick machen' (to have a picnic), or 'Blumen pflücken' (to pick flowers). It is often described as a 'grüne Wiese' (green meadow) or 'blühende Wiese' (flowering meadow).
Im Sommer machen wir oft ein Picknick auf der Wiese am Fluss.
In the summer, we often have a picnic in the meadow by the river.
The idiom 'auf der grünen Wiese bauen' means to construct a building on a previously undeveloped plot of land, usually on the outskirts of a city.
Die neue Fabrik wurde auf der grünen Wiese gebaut.
The new factory was built on a greenfield site.
field
'das Feld' and 'die Wiese' can both be open areas in a landscape. However, 'die Wiese' is always covered with grass and often also with herbs. Animals can graze there, or the grass is used as hay. 'das Feld' is more general and is often used for agricultural areas where, for example, grain, corn, or vegetables grow. The words can be confused because in some situations a meadow can also be understood as a field. If you want to emphasize the grassy area, use 'Wiese'; if you are talking about agricultural land in general, 'Feld' fits better.

Im Sommer spielen die Kinder oft auf der Wiese hinter dem Haus.
In summer, the children often play in the meadow behind the house.
Der Bauer fährt mit dem Traktor über das Feld.
The farmer drives the tractor across the field.