to push (back) the frontiers
01
to expand the boundaries or limits of knowledge, discovery, or understanding, typically in science, technology, or exploration
예시들
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
Collocation
예시들
The Roman Empire's conquests in ancient times pushed back the frontiers of their dominion.
