This is the 490th most frequent German word.
grenze
Border; boundary; limit.
Here, 'Grenze' is used as a noun meaning 'border,' referring to a line separating two areas, especially countries.
Die Grenze zwischen den Ländern wurde neu verhandelt.
The border between the countries was newly negotiated.
In this sentence, 'Grenze' is used metaphorically to mean 'limit,' referring to a constraint or boundary on possibilities.
Es gibt keine Grenze für deine Träume.
There is no limit to your dreams.
Here, 'Grenze' is once again used to mean 'border,' but this time in the context of a physical or figurative boundary one should not cross without authorization.