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to push (back) the frontiers
01
to expand the boundaries or limits of knowledge, discovery, or understanding, typically in science, technology, or exploration
Esempi
Last year, the exploration mission pushed the frontiers of space exploration by reaching new celestial bodies.
02
to extend the boundaries of a region or country, often through exploration, colonization, or territorial conquest
CollocationEsempi
Colonial powers pushed back the frontiers of their empires through overseas conquests.
