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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
Example
Scientists continuously strive to push back the frontiers of medical research.
Explorers have always sought to push the frontiers of human knowledge by reaching uncharted territories.
The artistic avant-garde seeks to push the frontiers of conventional artistic expression.
02
to extend the boundaries of a region or country, often through exploration, colonization, or territorial conquest
CollocationExample
European explorers pushed back the frontiers of the known world by discovering new continents.
The westward expansion of the United States in the 19th century pushed the frontiers of the nation.
The Roman Empire's conquests in ancient times pushed back the frontiers of their dominion.
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