as in borders
a region along the dividing line between two countries
the Apaches were once feared on both sides of the U.S.-Mexico frontier
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Recent Examples of frontiers
And frontiers always have a certain intellectual charisma.
—
Caleb Crain, Harpers Magazine, 24 Mar. 2026
These brave souls forged new frontiers for nation-states and planted the right flag for posterity.
—S.c. Stuart, PC Magazine, 18 Mar. 2026
Looking ahead, several frontiers remain for chemical rocketry.
—Lee Billings, Scientific American, 18 Mar. 2026
Putin’s expansionism is the latest iteration of Moscow’s longstanding foreign policy objectives, centered on pushing out frontiers to more defensible positions and reaffirming Russia’s status as a great power.
—Liam Denning, Bloomberg, 12 Mar. 2026
The frontiers of chip technology are constantly evolving and so using the newest hardware usually provides higher performance and energy efficiency, which reduces the risks of system failure.
—Claudia Levens, jsonline.com, 6 Mar. 2026
New particles and rare processes can be revealed through accelerator physics at or beyond the current energy frontiers, but this is not without risk.
—Big Think, 5 Mar. 2026
Addiction may be one of their next frontiers, an area where only small fractions of patients currently receive medications as treatment.
—Meg Tirrell, CNN Money, 4 Mar. 2026
In the nineteenth century, travel to remote frontiers beyond the reach of telegraph had insulated Britain’s men on the spot from London’s authority, conceding them the freedom to seize new territory.
—Alfred McCoy, Literary Hub, 26 Feb. 2026
Caleb Crain, Harpers Magazine, 24 Mar. 2026
These brave souls forged new frontiers for nation-states and planted the right flag for posterity.
—S.c. Stuart, PC Magazine, 18 Mar. 2026
Looking ahead, several frontiers remain for chemical rocketry.
—Lee Billings, Scientific American, 18 Mar. 2026
Putin’s expansionism is the latest iteration of Moscow’s longstanding foreign policy objectives, centered on pushing out frontiers to more defensible positions and reaffirming Russia’s status as a great power.
—Liam Denning, Bloomberg, 12 Mar. 2026
The frontiers of chip technology are constantly evolving and so using the newest hardware usually provides higher performance and energy efficiency, which reduces the risks of system failure.
—Claudia Levens, jsonline.com, 6 Mar. 2026
New particles and rare processes can be revealed through accelerator physics at or beyond the current energy frontiers, but this is not without risk.
—Big Think, 5 Mar. 2026
Addiction may be one of their next frontiers, an area where only small fractions of patients currently receive medications as treatment.
—Meg Tirrell, CNN Money, 4 Mar. 2026
In the nineteenth century, travel to remote frontiers beyond the reach of telegraph had insulated Britain’s men on the spot from London’s authority, conceding them the freedom to seize new territory.
—Alfred McCoy, Literary Hub, 26 Feb. 2026
Recent Examples of Synonyms for frontiers
borders
Noun
-
Beyond the country's borders, Los Choneros has forged ties with powerful transnational networks, including Mexico's Sinaloa cartel and criminal groups from Albania, enabling it to play a role in global drug trafficking routes.—
James LaPorta,
CBS News,
1 Apr. 2026
-
Ahead of the 2026 World Cup, soccer leaders within Congo enlisted a strategy widely used in international soccer — calling in the help of dual-national players with lineage to the country but who developed as players outside its borders.—
Andrew Greif,
NBC news,
1 Apr. 2026
Cite this Entry
“Frontiers.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/frontiers. Accessed 3 Apr. 2026.
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