This is the 1518th most frequent German word.
außerhalb
"Außerhalb" means "outside of" or "beyond" in English.
In this sentence, 'außerhalb' is used as a preposition meaning 'outside of', indicating a location outside of the referenced object, which is 'des Hauses' (the house).
Die Kinder spielen außerhalb des Hauses.
The children are playing outside the house.
Here, 'außerhalb' again acts as a preposition to specify a location beyond the city limits, demonstrating spatial relation.
Außerhalb der Stadt gibt es viele Felder.
Outside the city, there are many fields.
In this context, 'außerhalb' serves as an adverb to convey the notion of staying outside of an implied boundary, often a city or central area.