This is the 12054th most frequent Russian word.
зоопарке
"Зоопарке" means "in the zoo."
In this sentence, "зоопарке" is used with the preposition "в" which in conjunction with the prepositional case indicates a location.
Дети играли в зоопарке.
The children were playing at the zoo.
Here, "зоопарке" is used to describe a general presence or existence of something within the zoo.
В зоопарке много разных животных.
There are many different animals at the zoo.
In this sentence, "зоопарке" indicates a destination or venue where the activity will occur, marking it as a setting.