C1
frontier
ˈfrʌntɪə
noun
granica
Also
pogranicze(n)rubież(f)
Definition
A border separating two countries, or the extreme limit of settled land beyond which lies wilderness. Also, the limit of knowledge or achievement in a particular area.
Examples
They crossed the frontier into a new country.
Przekroczyli granicę do nowego kraju.
Space is often called the final frontier.
Kosmos często nazywany jest ostateczną granicą.
Scientists are pushing back the frontiers of medical knowledge.
Naukowcy przesuwają granice wiedzy medycznej.
Collocations
final frontiernew frontiertechnological frontier
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