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frontiers

NOUN

boundary

Synonyms

STRONG

borderland borderline bound confines edge limit march perimeter verge

Antonyms

STRONG

center inside interior middle

WEAK

metropolis

NOUN

unexplored, unoccupied area of land

Synonyms

STRONG

backwater backwoods boondocks bush hinterland outback outskirts sticks unknown

WEAK

backcountry boonies

Antonyms

WEAK

metropolis

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

"This study opens up new frontiers in research on human evolution," adds Professor Eleanor Scerri of the Max Planck Institute of Geoanthropology, also senior author of the study.

From Science Daily • May 3, 2026

Pyongyang closed its borders in January 2020 to stop the spread of the coronavirus, with research and media reports indicating that the diplomatically isolated nation spent subsequent years bolstering security along its frontiers.

From Barron's • Apr. 28, 2026

Others — often referred to as “me too” drugs — are chemically or mechanistically similar to existing therapies, designed to compete within established categories rather than to open new frontiers.

From MarketWatch • Apr. 15, 2026

But the EU border agency said last year that it was reviewing 12 cases of potential human rights violations by Greece, including some allegations that migrants seeking asylum were pushed back from Greece's frontiers.

From BBC • Feb. 4, 2026

The frontiers between the three superstates are in some places arbitrary, and in others they fluctuate according to the fortunes of war, but in general they follow geographical lines.

From "1984" by George Orwell