der Park
park
A public green space, usually within a city, with paths, trees, and benches, used for recreation.
Am Wochenende gehen wir oft im Park spazieren.
On weekends, we often go for a walk in the park.

park
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park
A public green space, usually within a city, with paths, trees, and benches, used for recreation.
Am Wochenende gehen wir oft im Park spazieren.
On weekends, we often go for a walk in the park.

The German noun 'der Park' (park) refers to a place. It is not the verb for the action of leaving a car somewhere. The corresponding German verb is 'parken' (to park).
Ich parke mein Auto immer in der Nähe vom Stadtpark.
I always park my car near the city park.
When indicating location, the case is crucial: You go 'in den Park' (into the park; direction, accusative), but you are already 'im Park' (in the park; location, dative).
Lass uns am Nachmittag in den Park gehen.
Let's go to the park in the afternoon.
In the meaning 'defined area', 'Park' (park) is almost always used as part of a compound word. These words describe the purpose of the area.
Am Wochenende fahren wir in einen Freizeitpark.
We're going to an amusement park on the weekend.
The meaning 'stock of vehicles' is used almost exclusively in the word 'der Fuhrpark' (vehicle fleet). This word refers to all the vehicles belonging to a company.
Die Firma modernisiert ihren Fuhrpark und kauft Elektroautos.
The company is modernizing its fleet and buying electric cars.
garden
'der Garten' and 'der Park' are both green places with plants. A 'Garten' often belongs to a house and is more private. People plant flowers, vegetables, or fruit there. A 'Park' is usually public and larger. People go there to walk, sit, or relax. The words can be confused because both can be green spaces. In some proper names, 'Garten' can also mean a public park. In everyday use, however, the rule is: private and by a house is usually 'Garten'; public and in the city is usually 'Park'.

Nach der Arbeit bin ich noch eine Runde durch den Park gegangen.
After work, I went for another walk through the park.
Im Sommer essen wir oft im Garten hinter dem Haus.
In summer, we often eat in the garden behind the house.